Comfort Systems USA 10-K 2021-12-31

Filed 2022-02-23. 20 sections, 382K characters. Original on sec.gov · Markdown · JSON

What changed since the 2020-12-31 10-KNew, removed and reworded risk factor headings, then every item sentence by sentence.

Cover and table of contents

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

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(Mark One)​
☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31**, 2021**
OR
☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to

Commission file number: 1-13011

Comfort Systems USA, Inc.

(Exact name of registrant as specified in its charter)

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Delaware (State or Other Jurisdiction of Incorporation or Organization)76-0526487 (I.R.S. Employer Identification No.)

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675 Bering Drive

Suite 400

Houston**,** Texas 77057

(713) 830-9600

(Address and telephone number of Principal Executive Offices)

Securities registered pursuant to Section 12(b) of the Act:

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Title of Each ClassTrading Symbol(s)Name of Each Exchange on which Registered
Common Stock, $.01 par valueFIXNew York Stock Exchange

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Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ⌧ No ◻

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ◻ No ⌧

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ⌧ No ◻

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ⌧ No ◻

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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Large accelerated filer ⌧Accelerated filer ◻Non-accelerated filer ◻Smaller reporting company ☐Emerging growth company ☐

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ⌧

The aggregate market value of the voting stock held by non-affiliates of the registrant at June 30, 2021 was approximately $2.79 billion, based on the $78.79 last sale price of the registrant’s common stock on the New York Stock Exchange on June 30, 2021.

As of February 18, 2022, 35,956,839 shares of the registrant’s common stock were outstanding (excluding treasury shares of 5,166,526).

DOCUMENTS INCORPORATED BY REFERENCE

The information required by Part III (other than the required information regarding executive officers) is incorporated by reference from the registrant’s definitive proxy statement, which will be filed with the Commission not later than 120 days following December 31, 2021.

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TABLE OF CONTENTS

Part I
Item 1.Business3
Item 1A.Risk Factors10
Item 1B.Unresolved Staff Comments23
Item 2.Properties23
Item 3.Legal Proceedings24
Item 4.Mine Safety Disclosures24
Item 4A.Executive Officers of the Registrant24
Part II
Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities25
Item 6.Reserved27
Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations27
Item 7A.Quantitative and Qualitative Disclosures about Market Risk41
Item 8.Financial Statements and Supplementary Data43
Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure81
Item 9A.Controls and Procedures81
Item 9B.Other Information83
Item 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections83
Part III
Item 10.Directors, Executive Officers and Corporate Governance83
Item 11.Executive Compensation83
Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters83
Item 13.Certain Relationships and Related Transactions, and Director Independence83
Item 14.Principal Accounting Fees and Services83
Part IV
Item 15.Exhibits and Financial Statement Schedules83
Item 16.Form 10-K Summary83
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FORWARD-LOOKING STATEMENTS

Certain statements and information in this Annual Report on Form 10 K may constitute forward looking statements within the meaning of applicable securities laws and regulations. The words “believe,” “expect,” “anticipate,” “plan,” “intend,” “foresee,” “should,” “would,” “could,” or other similar expressions are intended to identify forward looking statements, which are generally not historic in nature. These forward-looking statements are based on the current expectations and beliefs of Comfort Systems USA, Inc. and its subsidiaries (collectively, the “Company”) concerning future developments and their effect on the Company. While the Company’s management believes that these forward looking statements are reasonable as and when made, there can be no assurance that future developments affecting the Company will be those that it anticipates, and the Company’s actual results of operations, financial condition and liquidity, and the development of the industry in which the Company operates, may differ materially from those made in or suggested by the forward-looking statements contained in this Annual Report on Form 10 K. In addition, even if our results of operations, financial condition and liquidity, and the development of the industry in which we operate, are consistent with the forward-looking statements contained in this Annual Report on Form 10 K, those results or developments may not be indicative of our results or developments in subsequent periods. All comments concerning the Company’s expectations for future revenue and operating results are based on the Company’s forecasts for its existing operations and do not include the potential impact of any future acquisitions. The Company’s forward-looking statements involve significant risks and uncertainties (some of which are beyond the Company’s control) and assumptions that could cause actual future results to differ materially from the Company’s historical experience and its present expectations or projections. Known material factors that could cause the Company’s actual results to differ from those in the forward-looking statements are those described in Part I, “Item 1A. Risk Factors.”

Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof. The Company undertakes no obligation to publicly update or revise any forward-looking statements after the date they are made, whether as a result of new information, future events, or otherwise.

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PART I

The terms “Comfort Systems,” “we,” “us,” or “the Company” refer to Comfort Systems USA, Inc. or Comfort Systems USA, Inc. and its consolidated subsidiaries, as appropriate in the context.

Item 1. Business

Comfort Systems USA, Inc., a Delaware corporation, was established in 1997. We provide mechanical and electrical contracting services. Our mechanical segment principally includes heating, ventilation and air conditioning (“HVAC”), plumbing, piping and controls, as well as off-site construction, monitoring and fire protection. Our electrical segment includes installation and servicing of electrical systems. We build, install, maintain, repair and replace mechanical, electrical and plumbing (“MEP”) systems throughout our 41 operating units with 169 locations in 126 cities throughout the United States.

We operate primarily in the commercial, industrial and institutional MEP markets and perform most of our services in industrial, healthcare, education, office, technology, retail and government facilities. Substantially all of our consolidated 2021 revenue was derived from commercial, industrial and institutional customers and multi-family residential projects. Approximately 46.3% of our revenue was attributable to installation services in newly constructed facilities and 53.7% was attributable to renovation, expansion, maintenance, repair and replacement services in existing buildings. Our consolidated 2021 revenue was derived from the following service industries:

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​Percentage of
Service Activity​Revenue
Mechanical Services82.7%
Electrical Services​17.3%
Total100.0%

Industry Overview

We believe that commercial, industrial, and institutional mechanical and electrical contracting generate annual revenue in the United States of approximately $300 billion. Mechanical and electrical systems are necessary to virtually all commercial, industrial and institutional buildings. Because most buildings are sealed, HVAC systems provide the primary method of circulating fresh air in such buildings. Replacing an aging building’s existing systems with modern, energy-efficient systems significantly reduces a building’s energy consumption, carbon footprint, and operating costs while improving air quality and overall system effectiveness. Older commercial, industrial and institutional facilities frequently have poor air quality and provide less comfortable environments, and older HVAC systems result in significantly higher energy consumption than do modern systems. As electrical systems age they require service and replacement, and changing building configurations and technological power load requirements lead to the need to reconfigure and improve electrical systems in buildings on a regular basis.

Many factors affect mechanical and electrical services industry growth, including but not limited to, (i) population growth, which increases the need for commercial, industrial and institutional space, (ii) an aging installed base of buildings and equipment, (iii) increasing sophistication, complexity and efficiency of mechanical and electrical systems, and (iv) growing emphasis on internal air quality, environmental sustainability and energy efficiency.

Our industry can be broadly divided into two categories:

●construction of and installation in new buildings, which provided approximately 46.3% of our revenue in 2021, and
●renovation, expansion, maintenance, repair and replacement in existing buildings, which provided the remaining 53.7% of our 2021 revenue.

Construction, Installation, Expansion and Renovation Services— Construction, installation, expansion and renovation services consist of “design and build” and “plan and spec” projects. In “design and build” projects, the commercial MEP company is responsible for designing, engineering and installing a cost-effective, energy-efficient system customized to the specific needs of the building owner. Costs and other project terms are normally negotiated

between the building owner or its representative and the contracting company. Companies that specialize in “design and build” projects use a consultative approach with customers and tend to develop long-term relationships with building owners and developers, general contractors, architects, consulting engineers and property managers. “Plan and spec” installation refers to projects in which a third-party architect or consulting engineer designs the MEP systems and the installation project is “put out for bid.” We believe that “plan and spec” projects usually take longer to complete and frequently results in less efficient outcomes than “design and build” projects because the system design and installation process are not integrated, thus resulting in more frequent adjustments to project specifications, work requirements and schedules. Our investments in design and building information modeling enable us to collaborate with our customers to achieve reliable and energy efficient construction outcomes and to eliminate unnecessary waste.

Maintenance, Repair and Replacement Services—These services include maintaining, repairing, replacing, reconfiguring and monitoring previously installed systems and building automation controls. The growth and aging of the installed base of MEP and related systems, changing requirements due to increasing technology deployment, and the demand for more efficient systems and more capable building automation controls have fueled growth in these services. The increasing complexity of these systems leads many commercial, industrial and institutional building owners and property managers to outsource maintenance and repair, often through service agreements with service providers. State-of-the-art control and monitoring systems feature electronic sensors and microprocessors that are crucial to energy efficient operations. These systems require specialized training to install, maintain and repair. We believe that the work that we perform to optimize and upgrade systems and to enable wise controls helps Comfort Systems USA to optimize energy use and fundamentally reduce our nation’s carbon footprint.

Strategy

We focus on strengthening core operating competencies, leading in sustainability, efficiency and technological improvement, and on increasing profit margins. The key objectives of our strategy are to improve profitability and generate growth in our operations, to enable sustainable and efficient building environments, to improve the productivity of our workforce, and to acquire complementary businesses. Specifically, we are currently focused on the following elements:

Achieve Excellence in Core Competencies—We have identified seven core competencies that we believe are critical to attracting and retaining customers, increasing operating income and cash flow, and maximizing the productivity of our skilled labor force. The seven core competencies are: (i) safety, (ii) customer service, (iii) design and build expertise, (iv) effective pre-construction processes, (v) job and cost tracking, (vi) leadership in energy efficient and sustainable design, and (vii) best-in-class servicing of existing building systems.

Achieve Operating Efficiencies—We think we can achieve operating efficiencies and cost savings through purchasing economies, adopting “best practices,” and focusing on efficient job management. We are continually improving the “job loop” at our locations—qualifying, estimating, pricing, and executing projects effectively and efficiently. We also use our combined spend to gain purchasing advantages on products and services such as MEP components, raw materials, services, vehicles, bonding, insurance, and employee benefits.

Attract, Retain and Invest in our Employees—We seek to attract and retain quality employees by providing them an enhanced career path that offers a stable income, attractive benefits packages, and excellent growth opportunities. We continually invest in training, including programs for project managers, field superintendents, service managers, service technicians, sales managers, estimators, and leadership and development of key managers and leaders. We believe that skilled labor forces in the building and services trades have become increasingly scarce and valuable, and we are increasingly focused on growing and improving our skilled labor force, including through recruitment, development, and skills training for our hourly workers.

Focus on Industrial, Commercial and Institutional Markets—We focus on the industrial, commercial, and institutional building markets, including construction, maintenance, repair, and replacement services. We believe that these complex markets are attractive because of their growth opportunities, large and diverse customer base, attractive margins, and potential for long-term relationships with building owners.

Leverage Resources and Capabilities—We believe significant operating efficiencies can be achieved by leveraging resources among our operating locations. We have shifted certain fabrication activities to centralized locations to increase asset utilization. We opportunistically allocate our engineering, field, and supervisory labor from

one operation to another to use our employee base more fully, meet our customers’ needs and share expertise. Our ability to share resources frequently allows us to pursue work that would otherwise not be available to us and allows us to provide a more diversified and steady deployment of our labor. We believe we have realized scale benefits from coordinated purchasing, technical innovation, insurance, benefits, bonding, and financing activities across our operations.

Maintain a Diverse Customer, Geographic, and Project Base—We have a distribution of revenue across end-use sectors that we believe reduces our exposure to negative developments in any given sector. We also have significant geographical diversification across all regions of the United States, again reducing our exposure to negative developments in any given region. Our distribution of revenue in 2021 by end-use sector was as follows:

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Industrial44.1%
Education12.7%
Office Buildings10.1%
Healthcare13.6%
Government5.7%
Retail, Restaurants and Entertainment6.9%
Multi-Family and Residential3.7%
Other3.2%
Total100.0%

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Approximately 86.7% of our revenue is earned on a project basis for installation of systems in newly constructed or existing facilities. As of December 31, 2021, we had 7,831 projects in process with an aggregate contract value of approximately $6.3 billion. Our average project takes six to nine months to complete, with an average contract price of approximately $802,000. This average project size, when taken together with the approximately 13.3% of our revenue derived from maintenance and service, provides us with a broad base of work in the construction services sector. A stratification of projects in progress as of December 31, 2021, by contract price, is as follows:

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​​Aggregate
​​​​Contract
​​No. of​Price Value
Contract Price of Project​Projects​(millions)
Under $1 million6,864​$841.0​
$1 million - $5 million679​1,527.5​
$5 million - $10 million158​1,084.8​
$10 million - $15 million53​661.2​
Greater than $15 million77​2,167.6​
Total7,831​$6,282.1​

Develop and Adopt Leading Technologies—We are improving productivity by increasing use of innovative techniques in prefabrication, project design and planning, as well as in coordination and production methods. We have invested in the refinement and adoption of prefabrication practices. We work to identify, develop, and implement new materials, products and methods that can achieve greater productivity and more efficient and sustainable outcomes. Above all, we have concluded that as technology develops in our industry the fundamental prerequisite for leadership is adopting such opportunities in the quality, accuracy, and buildability of our designs. Accordingly, we have invested in the experts, training, and internal and external knowledge transfer to ensure that we are properly scaling, achieving true buildability, and fundamentally and continuously improving our design capabilities to meet our customers’ evolving requirements. Our goal is to use our scale and strategic investments to maintain a leading position in design and modeling excellence, optimize productivity and quality, and ultimately position ourselves to capitalize from ongoing or future technological developments.

Excel at Modular and Off-Site Construction—We believe that modular and off-site construction – the ability to build superior quality plants and systems away from the construction site – will become increasingly important in complex construction projects. Accordingly, through our acquisitions, we have invested in that capability, and after acquisition we have further invested in improving and growing that service offering. This has led to meaningful growth in our ability to provide this expertise. Through recent and ongoing development and acquisitions, we plan to continue to improve on our unmatched capability in mechanical off-site or modular construction.

Service Growth Initiative—Over the last several years we have made substantial investments to expand our service and maintenance revenue by increasing the value we can offer to service and maintenance customers. We are actively concentrating managerial and sales resources on training and hiring experienced employees to sell and profitably perform service work. In many locations we have added or upgraded our capability, and we believe our investments and efforts have provided customer value and stimulated growth in all aspects of our businesses.

Seek Growth through Acquisitions—We believe that we can further increase our cash flow and operating income by continuing to opportunistically enter new markets or service lines through acquisition. We have dedicated a significant portion of our cash flow on an ongoing basis to seeking opportunities to acquire businesses that have strong assembled workforces, excellent historical safety performance, leading design and energy efficiency capabilities, attractive market positions, a record of consistent positive cash flow, and desirable market locations.

Operations and Services Provided

We provide a wide range of construction, renovation, expansion, maintenance, repair and replacement services for MEP and related systems in commercial, industrial and institutional properties. Our local management teams maintain responsibility for day-to-day operating decisions. Local management is augmented by regional leadership that focuses on core business competencies, regional financial performance, cooperation and coordination between locations, implementing best practices and corporate initiatives. In addition to senior management, local personnel generally include design engineers, energy efficiency and sustainability experts, sales personnel, customer service personnel, installation and service technicians, sheet metal and prefabrication technicians, estimators and administrative personnel. We have centralized certain administrative functions such as insurance, employee benefits, training, safety programs, marketing and cash management to enable our local operating management to focus on pursuing new business opportunities and improving operating efficiencies.

Construction and Installation Services for New Buildings—Our installation business related to newly constructed facilities, which comprised approximately 46.3% of our consolidated 2021 revenue, involves the design, engineering, integration, installation and start-up of MEP and related systems. We provide “design and build” and “plan and spec” installation services for office buildings, retail centers, manufacturing plants, healthcare, education and government facilities and other commercial, industrial and institutional facilities. In a “design and build” installation, we work with the customer to determine the needed capacity and to optimize energy efficiency of the MEP systems that best suit the proposed facility. The final design, terms, price and timing of the project are then negotiated with the customer or its representatives, after which any necessary modifications are made to the system plan. In “plan and spec” installation, we participate in a bid process to provide labor, equipment, materials and installation based on the end user’s plans and engineering specifications.

Once an agreement has been reached, we order the necessary materials and equipment for delivery to meet the project schedule. In many instances we fabricate ductwork, conduit and piping and assemble certain components for the system based on the mechanical drawing specifications. Finally, we install the systems at the project site, working closely with the owner or general contractor. Our average project takes six to nine months to complete, with an average contract price of approximately $802,000. We also perform larger project work, with 967 contracts in progress at December 31, 2021 with contract prices in excess of $1 million. Our largest project in progress at December 31, 2021 had a contract price of $78.3 million. Project contracts typically provide for periodic billings to the customer as we meet progress milestones or incur cost on the project. Project contracts in our industry also frequently allow for a small portion of progress billings or contract price to be withheld by the customer until after we have completed the work. Amounts withheld under this practice are known as retention or retainage.

Renovation, Expansion, Maintenance, Monitoring, Repair and Replacement Services for Existing Buildings—Our renovation, expansion, maintenance, monitoring, repair and replacement services in existing buildings comprised approximately 53.7% of our consolidated 2021 revenue. Maintenance and repair services are provided either in response to service calls or under a service agreement. Service calls are coordinated by customer service representatives or dispatchers that use computer and communication technology to process orders, arrange service calls, dispatch technicians and communicate with and invoice customers. Service technicians work from service vehicles equipped with commonly used parts, supplies and tools to complete a variety of jobs. Optimal maintenance is crucial to energy efficient operations. Commercial, industrial and institutional service agreements usually have terms of one or more years, with automatic annual renewals, and frequently include thirty- to sixty-day cancellation notice periods. We also provide remote monitoring of power usage, temperature, pressure, humidity and air flow for MEP and other building systems.

Sources of Supply

The raw materials and components we use include MEP system components, ductwork, pipe, conduit, wire, electrical fixtures, steel, sheet metal and copper tubing and piping. These raw materials and components are generally available from a variety of domestic or foreign suppliers at competitive prices. In ordinary times, delivery times are typically short for most raw materials and standard components, but during periods of peak demand, including the ongoing pandemic, may extend one month to several months. We estimate that direct purchase of commodities and finished products comprises between 35% and 40% of our average project cost. We have procedures to reduce commodity cost exposure such as purchasing commodities early for projects, as well as selectively including time or market-based escalation and escape provisions in bids and contracts.

Chillers for large applications typically have the longest delivery time and frequently have lead times of up to six months. The major components of commercial MEP systems are compressors and chillers that are manufactured primarily by Carrier, Lennox, Daikin, Trane, and York. The major suppliers of building automation control systems are Automated Logic, Cisco, Delta, Distech Controls, Honeywell, Johnson Controls, Rockwell Automation, Schneider Electric, Siemens, Trane, and York. The major suppliers of electrical switchgear and generators are Caterpillar, Cummins, Eaton and Schneider Electric. We do not have any significant contracts guaranteeing us a supply of raw materials or components.

Cyclicality and Seasonality

The construction industry is subject to business cycle fluctuation. As a result, our volume of business, particularly in new construction projects and renovation, may be adversely affected by declines in new installation and replacement projects in various geographic regions of the United States during periods of economic weakness.

The mechanical and electrical contracting industries are also subject to seasonal variations. The demand for new installation and replacement is generally lower during the winter months (the first quarter of the year) due to reduced construction activity during inclement weather and less use of air conditioning during the colder months. Demand for our services is generally higher in the second and third calendar quarters due to increased construction activity and increased use of air conditioning during the warmer months. Accordingly, we expect our revenue and operating results generally will be lower in the first calendar quarter.

Sales and Marketing

We have a diverse customer base, with our top customer representing 9% of consolidated 2021 revenue, and our largest customer often changes from year to year. Management and a dedicated sales force are responsible for developing and maintaining successful long-term relationships with key customers. Customers generally include building owners and developers and property managers, as well as general contractors, architects and consulting engineers. We intend to continue our emphasis on developing and maintaining long-term relationships with our customers by providing superior, high-quality service in a professional manner. We believe we can continue to leverage the diverse technical and marketing strengths at individual locations to expand the services offered in other local markets. With respect to multi-location service opportunities, we maintain a national sales force in our national accounts group.

Human Capital Resources

Employees—As of December 31, 2021, we had approximately 13,200 employees as compared to approximately 11,100 employees as of December 31, 2020. We have collective bargaining agreements covering less than ten employees. We have not experienced and do not expect any significant strikes or work stoppages and believe our relations with employees covered by collective bargaining agreements are good.

Culture and Core Values—Our values define, inform, and guide the way we operate both within our Company and in the communities where we do business. Our core values are to be safe; be honest; be respectful; be innovative; and be collaborative. These values set the foundation for our Code of Conduct, which applies to all employees, officers, and directors of the Comfort Systems USA family of companies. The Code of Conduct is regularly reinforced to the Company’s employees and management through periodic ethics, equal opportunity employment, and anti-corruption trainings. In addition, certain business partners, such as consultants, agents, suppliers, contractors, and other third

parties, serve as an extension of the Company. They are expected to follow the spirit of our Code of Conduct, all applicable laws, and any applicable contractual provisions when working on our behalf.

We believe that the way we conduct business is just as important as the business we do. Operating with integrity helps us deliver on the promises we have made to each other, our customers, and the communities where we live and work. It is also the basis for ensuring continued growth and success. Everyone at our Company shares a responsibility for doing business ethically and in a sustainable manner, preserving our good name. We ensure that this responsibility applies at every level in our organization, and everyone from corporate officers to members of our Board of Directors, to our field personnel is responsible for overseeing these efforts.

Recruiting and Training—Our continued success depends, in part, on our ability to continue to attract, retain and motivate qualified engineers, service technicians, field supervisors and project managers. We believe our success in retaining qualified employees will be based on the quality of our recruiting, training, compensation, employee benefits programs and opportunities for advancement. We provide numerous training programs for management, sales, and leadership, as well as on-the-job training, technical training, apprenticeship programs, attractive benefit packages and career advancement opportunities within our Company.

Safety—We have established comprehensive safety programs throughout our operations to ensure that all employees comply with safety standards we have established and that are established under federal, state, and local laws and regulations. Safety leadership establishes safety programs and benchmarking to improve safety across the Company. Additionally, our employment screening process seeks to determine that prospective employees have requisite skills, sufficient background references and acceptable driving records, if applicable. Our rate of incidents recordable under the standards of the Occupational Safety and Health Administration (“OSHA”) per one hundred employees per year, also known as the OSHA recordable rate, was 1.28 during 2021. This level was 42% better than the most recently published OSHA rate for our industry.

Diversity and Inclusion—We are an equal opportunity employer, and we welcome and celebrate our teams’ differences, experiences, and beliefs. We expect all employees to be treated with dignity and respect in an environment free from discrimination and harassment regardless of race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, veteran status, genetic information, or any other protected class. We know that diversity is truly a competitive advantage that helps drive growth and innovation, and we have increasingly focused on diversity and inclusion programs within our Company. Diversity and inclusion are among our leadership team’s top priorities, with clearly outlined near-term actions to accelerate progress in outreach, representation, development, and advancement of underrepresented groups within our Company. Our Board of Directors and Board committees provide oversight on certain human capital matters, including our diversity and inclusion strategy.

Insurance and Litigation

The primary insured risks in our operations are bodily injury, property damage and workers’ compensation injuries. We retain the risk for workers’ compensation, employer’s liability, auto liability, general liability and employee group health claims resulting from uninsured deductibles per-incident or occurrence. Because we have very large per incident deductibles, the vast majority of our claims are paid by us, so as a practical matter we self-insure the great majority of these risks. Losses up to such per-incident deductible amounts are estimated and accrued based upon known facts, historical trends and industry averages using the assistance of an actuary to project the extent of these obligations.

We are subject to certain claims and lawsuits arising in the normal course of business. We maintain various insurance coverages to minimize financial risk associated with these claims. We have estimated and provided accruals for probable losses and related legal fees associated with certain litigation in our consolidated financial statements. While we cannot predict the outcome of these proceedings, in our opinion and based on reports of counsel, any liability arising from these matters individually and in the aggregate will not have a material effect on our operating results, cash flows or financial condition, after giving effect to provisions already recorded.

We typically warrant labor for the first year after installation on new MEP systems that we build and install, and we pass through to the customer manufacturers’ warranties on equipment. We generally warrant labor for thirty days after servicing existing MEP systems. We do not expect warranty claims to have a material adverse effect on our financial position or results of operations.

Competition

The mechanical and electrical contracting industries are highly competitive and consist of thousands of local and regional companies. We believe that purchasing decisions in the commercial, industrial, and institutional markets are based on (i) competitive price, (ii) relationships, (iii) quality, timeliness, and reliability, (iv) tenure, financial strength, and access to bonding, (v) range of capabilities, and (vi) scale of operation. To improve our competitive position, we focus on both the consultative “design and build” installation market and the maintenance, repair, and replacement market to develop and strengthen customer relationships. In addition, we believe our ability to provide multi-location coverage and a broad range of services gives us a strategic advantage over smaller competitors who may have more limited resources and capabilities.

We believe that we are larger than most of our competitors, which are generally small, owner-operated companies in a specific area. However, there are divisions of larger contracting companies, utilities and MEP equipment manufacturers that provide MEP services in some of the same service lines and geographic areas we serve. Some of these competitors and potential competitors have greater financial resources than we do to finance development opportunities and support their operations. We believe our smaller competitors generally compete with us based on price and their long-term relationships with local customers. Our larger competitors compete with us on those factors but may also provide attractive financing and comprehensive service and product packages.

Vehicles

We operate a fleet of various owned or leased service trucks, vans and support vehicles. We believe these vehicles generally are well maintained and sufficient for our current operations.

Climate Change and Sustainability

We recognize our environmental and societal responsibilities and are committed to sustainability and to improving our environmental footprint as well as operating our business in a manner that seeks to protect the health and safety of our employees and customers, as well as the public. Our focus on environmental stewardship and improving productivity drives not only our efforts to become more energy efficient but also improvements in our customers' impact on climate change. Replacing an aging building’s existing systems with modern, energy-efficient systems significantly reduces a building’s energy consumption and carbon footprint while improving cost, air quality, and overall system effectiveness.

We are subject to the requirements of numerous federal, state, and local laws, regulations, and rules that promote the protection of the environment. While capital expenditures or operating costs for environmental compliance cannot be predicted with certainty, we do not currently anticipate that they will have a material effect on our capital expenditures or competitive position in the short term.

Additionally, we plan to increase our voluntary reporting through submissions to CDP (formerly the Carbon Disclosure Project) and the Task Force on Climate-related Financial Disclosures (“TCFD”). Such additional disclosures are a continuation of our efforts to adhere to voluntary reporting standards – for example, in 2021, we received a bronze medal as a result of our initial EcoVadis submission, and we published our first sustainability report (i) using the Sustainability Accounting Standard Board’s (“SASB”) standards for the Engineering and Construction Services industry, and (ii) in accordance with the Global Reporting Initiative (“GRI”) Standards: Core option.

Governmental Regulation and Environmental Matters

Our operations are subject to various federal, state and local laws and regulations, including: (i) licensing requirements applicable to engineering, construction and service technicians, (ii) building and MEP codes and zoning ordinances, (iii) regulations relating to consumer protection, including those governing residential service agreements, (iv) special bidding and procurement requirements on government projects, (v) wage and hour regulations, and (vi) regulations relating to worker safety and protection of the environment. For example, our operations are subject to the requirements of OSHA and comparable state laws directed towards protection of employees. We believe we have all required licenses to conduct our operations and are in substantial compliance with applicable regulatory requirements. If we fail to comply with applicable regulations, we could be subject to substantial fines or revocation of our operating licenses.

Many state and local regulations governing the MEP services trades require individuals to hold permits and licenses. In some cases, a required permit or license held by a single individual may be sufficient to authorize specified activities for all of our service technicians who work in the state or county that issued the permit or license. We seek to ensure that, where possible, we have two employees who hold any such permits or licenses that may be material to our operations in a particular geographic region.

Our operations are subject to the federal Clean Air Act, as amended, which governs air emissions and imposes specific requirements on the use and handling of ozone-depleting refrigerants generally classified as chlorofluorocarbons (“CFCs”) or hydrochlorofluorocarbons (“HCFCs”). Clean Air Act regulations promulgated by the United States Environmental Protection Agency (“USEPA”) require the certification of service technicians involved in the service or repair of equipment containing these refrigerants and also regulate the containment and recycling of these refrigerants. These requirements have increased our training expenses and expenditures for containment and recycling equipment. The Clean Air Act is intended ultimately to eliminate the use of ozone-depleting substances such as CFCs and HCFCs in the United States and to require alternative refrigerants to be used in replacement HVAC systems. Some replacement refrigerants, already in use, and classified as hydrofluorocarbons (“HFCs”) are not ozone-depleting substances. HFCs are considered by USEPA to have high global warming potential. USEPA may at some point require the phase-out of HFCs and expand existing technician certification requirements to cover the handling of HFCs. We do not believe the existing regulations governing technician certification requirements for the handling of ozone-depleting substances or possible future regulations applicable to HFCs will materially affect our business on the whole because, although they require us to incur modest ongoing training costs, our competitors also incur such costs, and such regulations may encourage or require our customers to update their MEP systems.

Additional Information

Our Internet address is www.comfortsystemsusa.com. We make available free of charge on or through our website our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission (the “SEC”). These materials are also available at www.sec.gov. Our website also includes our code of ethics, titled the “Code of Conduct,” together with other governance materials including our corporate governance standards and our Board committee charters for the audit committee, the compensation committee, and the governance and nominating committee; the executive committee, formed in 2019, operates under written grants of authority that may be amended from time to time by the Board. Printed versions of our code of ethics and our corporate governance standards may be obtained upon written request to our Corporate Compliance Officer at our headquarters address.

The content of our websites is not incorporated by reference into this annual report on Form 10-K or in any other report or document we file with the SEC, and any references to our websites are intended to be inactive textual references only.

Item 1A. Risk Factors

Our business is subject to a variety of risks and uncertainties, including, but not limited to, the risks and uncertainties described below. You should carefully consider the risks described below, together with all other information included in this report, including information contained in the “Business,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Quantitative and Qualitative Disclosures about Market Risk” sections. Our business, financial condition, results of operations or cash flows could be adversely affected by the occurrence of any of these events, which could cause actual results to differ materially from expected and historical results, and the trading price of our common stock could decline.

Risks Related to Our Business

Economic downturns in the markets in which we operate may materially and adversely affect our business because our business is dependent on levels of construction activity.

The demand for our services is dependent upon the existence of construction projects and service requirements within the markets in which we operate. Any period of economic recession, including the ongoing recession caused by the Coronavirus Disease 2019 (“COVID-19”) pandemic, affecting a market or industry in which we transact business is

likely to adversely impact our business. Many of the projects we work on have long lifecycles from conception to completion, and the bulk of our performance generally occurs late in a construction project’s lifecycle. We experience the results of economic trends well after an economic cycle begins, and therefore have generally continued to experience the results of an economic recession well after conditions in the general economy have improved.

The industries and markets in which we operate have always been and will continue to be vulnerable to macroeconomic downturns because they are cyclical in nature. When there is a reduction in demand, it often leads to greater price competition as well as decreased revenue and profit. The lasting effects of a recession can also increase economic instability with our vendors, subcontractors, developers, and general contractors, which can increase our liability exposure and result in us not being paid in full or at all on some projects, thus decreasing our revenue and profit. Further, to the extent some of our vendors, subcontractors, developers, or general contractors seek bankruptcy protection, such bankruptcy will likely force us to incur additional costs in attorneys’ fees, as well as other professional consultants, and will result in decreased revenue and profit. Additionally, because 5.7% of our revenue for the year ended December 31, 2021 was attributable to projects in the government sector, a reduction in federal, state, or local government spending in our industries and markets could result in decreased revenue and profit for us.

Because we bear the risk of cost overruns in most of our contracts, we may experience reduced profits or, in some cases, losses under these contracts if costs increase above our estimates.

Our contract prices are established largely based on estimates and assumptions of our projected costs, including assumptions about: future economic conditions; prices, including commodity prices; availability of labor, including the costs of providing labor, equipment, and materials; and other factors outside our control. If our estimates or assumptions prove to be inaccurate, circumstances change in a way that renders our assumptions and estimates inaccurate or we fail to successfully execute the work, cost overruns may occur, and we could experience reduced profits or a loss for affected projects. For instance, unanticipated technical problems may arise, we could have difficulty obtaining permits or approvals, local laws, labor costs or labor conditions could change, bad weather could delay construction, raw materials prices could increase, our suppliers or subcontractors may fail to perform as expected or site conditions may be different than we expected. We are also exposed to increases in energy prices, particularly as they relate to gasoline prices. Additionally, in certain circumstances, we guarantee project completion or the achievement of certain acceptance and performance testing levels by a scheduled date. Failure to meet schedule or performance requirements typically results in additional costs to us, and in some cases, we may also create liability for consequential and liquidated damages. Performance problems for existing and future projects could cause our actual results of operations to differ materially from those we anticipate and could damage our reputation within our industry and our customer base.

Our backlog is subject to unexpected adjustments and cancellations, which means that amounts included in our backlog may not result in actual revenue or translate into profits.

Backlog reflects revenue still to be recognized under contracted or committed installation and replacement project work. Our backlog as of December 31, 2021 was $2.31 billion. The predictive value of backlog information is limited to indications of general revenue direction over the near term, and we cannot guarantee that the revenue projected from our backlog will be realized or, if realized, will be profitable. Projects may remain in our backlog for an extended period of time, or project cancellations or scope adjustments may occur with respect to contracts reflected in our backlog. Such changes may adversely affect the revenues and profit we ultimately realize on these projects.

The effects of the COVID-19 pandemic and related economic repercussions have materially affected how we and our customers, vendors, subcontractors, developers, and general contractors are operating our businesses, and the duration and extent to which this will negatively impact our future results of operations and overall financial performance remains uncertain.

​

The COVID-19 pandemic has negatively impacted the global economy, disrupted consumer spending and global supply chains, and created significant volatility and disruption of financial markets. We have experienced some resulting disruptions to our business operations, and we expect the COVID-19 pandemic could have a material adverse impact on our business and financial performance. The COVID-19 pandemic and related responses are continuing to evolve and, therefore, continue to present potential risks to our business, particularly in light of new variants of the virus. The extent of the impact of the COVID-19 pandemic on our business and financial performance, including our ability to execute our near-term and long-term business strategies and initiatives in the expected time frame, depends on numerous evolving factors outside our control including: emergence of new variants of the virus; government, social, business and

other actions that have been and will be taken in response to the COVID-19 pandemic; any additional waves of COVID-19 infections; the efficacy of vaccines on new variants of the virus; the effect of government or customer vaccine or testing requirements on employee retention and recruitment; and the effect of the COVID-19 pandemic on short- and long-term general economic conditions.

​

We have been negatively impacted by the COVID-19 pandemic as a result of the shelter-in-place restrictions and work disruptions in some of our service areas creating disruptions to portions of our operations, particularly in major metropolitan markets that have been meaningfully impacted by the pandemic. We have also experienced permitting and regulatory delays attributable to the COVID-19 pandemic. In addition to these current dynamics, the COVID-19 pandemic may create or exacerbate risks related to our operations and regulatory and compliance matters, including as a result of:

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| | ● | evolving governmental guidance or requirements, includin

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Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

As of December 31, 2021, we owned 15 properties. Other than these owned properties, we lease the real property and buildings from which we operate. Our facilities are located in 27 states and consist of offices, shops and fabrication, maintenance and warehouse facilities. Generally, leases range from three to ten years and are on terms we believe to be commercially reasonable. A majority of these premises are leased from individuals or entities with whom we have no other business relationship. In certain instances, these leases are with current or former employees. To the extent we renew, enter into leases or otherwise change leases with current or former employees, we enter into such agreements on terms that reflect a fair market valuation for the properties. Leased premises range in size from approximately 1,000 square feet to 110,000 square feet. To maximize available capital, we generally intend to continue to lease our properties, but may consider further purchases of property where we believe ownership would be more economical. We believe that our facilities are sufficient for our current needs.

We lease our executive and administrative offices in Houston, Texas.

Item 3. Legal Proceedings

We are subject to certain legal and regulatory claims, including lawsuits arising in the normal course of business. We maintain various insurance coverages to minimize financial risk associated with these claims. We have estimated and provided accruals for probable losses and related legal fees associated with certain litigation in our consolidated financial statements. While we cannot predict the outcome of these proceedings, in management’s opinion and based on reports of counsel, any liability arising from these matters individually and in the aggregate will not have a material effect on our operating results, cash flows or financial condition, after giving effect to provisions already recorded.

We are in a dispute with a customer regarding the outcome of a completed project and also regarding the obligation to perform subcontract work under two executed letters of intent for subsequent projects that we believe are not enforceable. The customer is claiming approximately $12 million in damages related to performance of the original project as well as excess costs to perform the work that was subject to the letters of intent. We are claiming approximately $9 million composed of unpaid amounts under the completed contract as well as costs and inefficiencies that we suffered. We have a lien on the project, and this matter is currently scheduled for arbitration in the second quarter of 2022 with a likely decision in the following months. As of December 31, 2021, we recorded an accrual for this matter based on our analysis of likely outcomes related to this dispute; however, it is possible that the ultimate outcome and associated costs will deviate from our estimates and that, in the event of an unexpectedly adverse outcome, we may experience additional costs and expenses in future periods.

Item 4. Mine Safety Disclosures

Not applicable.

Item 4A. Executive Officers of the Registrant

Executive officers are appointed by our Board of Directors and hold office until their successors are elected and duly qualified. The following persons serve as executive officers of the Company.

Brian E. Lane, age 64, has served as our Chief Executive Officer and President since December 2011 and as a director since November 2010. Mr. Lane served as our President and Chief Operating Officer from March 2010 until December 2011. Mr. Lane joined the Company in October 2003 and served as Vice President and then Senior Vice President for Region One of the Company until he was named Executive Vice President and Chief Operating Officer in January 2009. Prior to joining the Company, Mr. Lane spent fifteen years at Halliburton, the global service and equipment company devoted to energy, industrial, and government customers. During his tenure at Halliburton, he held various positions in business development, strategy, and project initiatives. He departed as the Regional Director of Europe and Africa. Mr. Lane’s additional experience includes serving as a Regional Director of Capstone Turbine Corporation, a distributed power manufacturer. He also was a Vice President of Kvaerner, an international engineering and construction company where he focused on the chemical industry. Mr. Lane holds a Bachelor of Science in Chemistry from the University of Notre Dame and a Master of Business Administration from Boston College.

William George, age 57, has served as our Executive Vice President and Chief Financial Officer since May 2005, was our Senior Vice President, General Counsel and Secretary from May 1998 to May 2005, and was our Vice President, General Counsel and Secretary from March 1997 to April 1998. Since October 2011, Mr. George has also served as Regional Vice President. Mr. George was a member of our founding management team in connection with our formation in 1997. From October 1995 to February 1997, Mr. George was Vice President and General Counsel of American Medical Response, Inc., a publicly-traded healthcare transportation company. From September 1992 to September 1995, Mr. George practiced corporate and antitrust law at Ropes & Gray, a Boston, Massachusetts, law firm. Mr. George holds a Bachelor of Science in Economics from Brigham Young University and a Juris Doctorate from Harvard Law School.

Julie S. Shaeff, age 56, has served as our Senior Vice President and Chief Accounting Officer since May 2005, was our Vice President and Corporate Controller from March 2002 to May 2005, and was our Assistant Corporate Controller from September 1999 to February 2002. From 1996 to August 1999, Ms. Shaeff was Financial Accounting Manager—Corporate Controllers Group for Browning-Ferris Industries, Inc., a publicly-traded waste services company. From 1987 to 1995, she held various positions with Arthur Andersen LLP. Ms. Shaeff is a Certified Public Accountant and holds a Bachelor of Business Administration in Accounting from Texas A&M University.

Trent T. McKenna, age 49, has served as Chief Operating Officer and Executive Vice President since January 2022 and was formerly Chief Operating Officer and Senior Vice President during 2021. Mr. McKenna previously served as our Senior Vice President and Vice President – Region 4 from January 2019 to December 2020; Senior Vice President, General Counsel and Secretary from August 2013 to December 2018; Vice President, General Counsel and Secretary from May 2005 to August 2013; and Associate General Counsel from August 2004 to May 2005. From February 1999 to August 2004, Mr. McKenna was a practicing attorney in the area of complex commercial litigation in the Houston, Texas, office of Akin Gump Strauss Hauer & Feld LLP, an international law firm. Mr. McKenna earned a Bachelor of Arts degree in English from Brigham Young University and his Juris Doctorate from Duke University School of Law.

Laura F. Howell, age 34, has served as Senior Vice President and General Counsel for the Company since January 2022 and formerly served as Vice President and General Counsel from January 2019 to December 2021. Previously, Ms. Howell served as the Associate General Counsel from January 2018 to December 2018 and as Senior Counsel, Corporate from November 2014 to December 2017. Prior to joining the Company, she was an associate in the corporate department of the Houston office of Latham & Watkins, LLP from November 2013 to October 2014. From September 2012 to October 2013, Ms. Howell was an associate in the corporate department of the Silicon Valley office of Fenwick & West, LLP. Ms. Howell holds a Bachelor of Arts in Economics from Wake Forest University and a Juris Doctorate from Stanford Law School.

Terrence Reed, age 62, has served as Senior Vice President of People and Leadership Development for the Company since March 2021. Mr. Reed joined the Company after working in various senior manufacturing and HR leadership positions in several organizations, including Koch Engineered Solutions and Buckeye Technologies. Mr. Reed is a graduate of the University of South Alabama, where he completed studies in Mechanical Engineering, and is a former US Army officer.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Our Common Stock is traded under the symbol FIX on the New York Stock Exchange.

As of February 18, 2022, there were approximately 301 stockholders of record of our Common Stock, and the last reported sale price on that date was $88.22 per share.

We expect to continue paying cash dividends quarterly, although there is no assurance as to future dividends because they depend on future earnings, capital requirements, and financial condition. In addition, our credit agreement may limit the amount of dividends we can pay at any time that our Total Leverage Ratio exceeds 2.00 to 1.00.

The following Corporate Performance Graph and related information shall not be deemed “soliciting material” or to be “filed” with the SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act or the Exchange Act, except to the extent that we specifically incorporate it by reference into such filing.

Graphic

​

Recent Sales of Unregistered Securities

None.

Issuer Purchases of Equity Securities

On March 29, 2007, our Board of Directors (the “Board”) approved a stock repurchase program to acquire up to 1.0 million shares of our outstanding common stock. Subsequently, the Board has from time to time increased the number of shares that may be acquired under the program and approved extensions of the program. On December 8, 2020, the Board approved an extension to the program by increasing the shares authorized for repurchase by 0.7 million shares. Since the inception of the repurchase program, the Board has approved 10.3 million shares to be repurchased. As of December 31, 2021, we have repurchased a cumulative total of 9.7 million shares at an average price of $21.69 per share under the repurchase program.

The share repurchases will be made from time to time at our discretion in the open market or privately negotiated transactions as permitted by securities laws and other legal requirements, and subject to market conditions and other factors. The Board may modify, suspend, extend or terminate the program at any time. During the year ended December 31, 2021, we repurchased 0.4 million shares for approximately $27.1 million at an average price of $74.57 per share.

During the year ended December 31, 2021, we purchased our common shares in the following amounts at the following average prices:

​​​​​​​​​​​
​​​​Total Number of SharesMaximum Number of
​​​​​​​Purchased as Part of​Shares that May Yet Be
​​Total Number of​Average Price​Publicly Announced Plans​Purchased Under the Plans
Period​Shares Purchased​Paid Per Share​or Programs (1)​or Programs
January 1 - January 313,000​$52.599,315,001978,750​
February 1 - February 28—​$—9,315,001978,750​
March 1 - March 3110,250​$70.999,325,251968,500​
April 1 - April 303,500​$75.459,328,751965,000​
May 1 - May 318,721​$80.499,337,472956,279​
June 1 - June 3014,871​$80.399,352,343941,408​
July 1 - July 3155,886​$75.639,408,229885,522​
August 1 - August 31111,856​$74.919,520,085773,666​
September 1 - September 30138,380​$71.399,658,465635,286​
October 1 - October 311,170​$71.199,659,635634,116​
November 1 - November 30—​$—9,659,635634,116​
December 1 - December 3115,162​$94.939,674,797618,954​
​362,796​$74.579,674,797618,954​
(1)Purchased as part of a program announced on March 29, 2007 under which, since the inception of this program, 10.3 million shares have been approved for repurchase.

​

Under our 2012 Equity Incentive Plan and 2017 Omnibus Incentive Plan, employees may elect to have us withhold common shares to satisfy statutory federal, state and local tax withholding obligations arising on the vesting of restricted stock awards and exercise of options. When we withhold these shares, we are required to remit to the appropriate taxing authorities the market price of the shares withheld, which could be deemed a purchase of the common shares by us on the date of withholding.

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Item 6. [Reserved]

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis should be read in conjunction with the Consolidated Financial Statements and related notes included elsewhere in this annual report on Form 10-K. Also see “Forward-Looking Statements” discussion.

Introduction and Overview

We are a national provider of comprehensive mechanical and electrical installation, renovation, maintenance, repair and replacement services within the mechanical and electrical services industries. We operate primarily in the commercial, industrial and institutional markets and perform most of our work in industrial, healthcare, education, office, technology, retail and government facilities. We operate our business in two business segments: mechanical and electrical.

Nature and Economics of Our Business

In our mechanical business segment, customers hire us to ensure HVAC systems deliver specified or generally expected heating, cooling, conditioning and circulation of air in a facility. This entails installing core system equipment such as packaged heating and air conditioning units, or in the case of larger facilities, separate core components such as chillers, boilers, air handlers, and cooling towers. We also typically install connecting and distribution elements such as piping and ducting.

In our electrical business segment, our principal business activity is electrical construction and engineering in the commercial and industrial field. We also perform electrical logistics services, electrical service work, and electrical construction and engineering services.

In both our mechanical and electrical business segments, our responsibilities usually require conforming the systems to pre-established engineering drawings and equipment and performance specifications, which we frequently participate in establishing. Our project management responsibilities include staging equipment and materials to project sites, deploying labor to perform the work, and coordinating with other service providers on the project, including any subcontractors we might use to deliver our portion of the work.

Approximately 86.7% of our revenue is earned on a project basis for installation services in newly constructed facilities or for replacement of systems in existing facilities. When competing for project business, we usually estimate the costs we will incur on a project, and then propose a bid to the customer that includes a contract price and other performance and payment terms. Our bid price and terms are intended to cover our estimated costs on the project and provide a profit margin to us commensurate with the value of the installed system to the customer, the risk that project costs or duration will vary from estimate, the schedule on which we will be paid, the opportunities for other work that we might forego by committing capacity to this project, and other costs that we incur to support our operations but which are not specific to the project. Typically, customers will seek pricing from competitors for a given project. While the criteria on which customers select a provider vary widely and include factors such as quality, technical expertise, on-time performance, post-project support and service, and company history and financial strength, we believe that price for value is the most influential factor for most customers in choosing a mechanical or electrical installation and service provider.

After a customer accepts our bid, we generally enter into a contract with the customer that specifies what we will deliver on the project, what our related responsibilities are, and how much and when we will be paid. Our overall price for the project is typically set at a fixed amount in the contract, although changes in project specifications or work conditions that result in unexpected additional work are usually subject to additional payment from the customer via what are commonly known as change orders. Project contracts typically provide for periodic billings to the customer as we meet progress milestones or incur cost on the project. Project contracts in our industry also frequently allow for a small portion of progress billings or contract price to be withheld by the customer until after we have completed the work. Amounts withheld under this practice are known as retention or retainage.

Labor, materials and overhead costs account for the majority of our cost of service. Accordingly, labor management and utilization have the most impact on our project performance. Given the fixed price nature of much of our project work, if our initial estimate of project costs is wrong or we incur cost overruns that cannot be recovered in change orders, we can experience reduced profits or even significant losses on fixed price project work. We also perform some project work on a cost-plus or a time and materials basis, under which we are paid our costs incurred plus an agreed-upon profit margin, and such projects are sometimes subject to a guaranteed maximum cost. These margins are frequently less than fixed-price contract margins because there is less risk of unrecoverable cost overruns in cost-plus or time and materials work.

As of December 31, 2021, we had 7,831 projects in process. Our average project takes six to nine months to complete, with an average contract price of approximately $802,000. Our projects generally require working capital funding of equipment and labor costs. Customer payments on periodic billings generally do not recover these costs until late in the job. Our average project duration, together with typical retention terms as discussed above, generally allow us to complete the realization of revenue and earnings in cash within one year. We have what we consider to be a well-diversified distribution of revenue across end-use sectors that we believe reduces our exposure to negative developments in any given sector. Because of the integral nature of our services to most buildings, we have the legal right in almost all cases to attach liens to buildings or related funding sources when we have not been fully paid for installing systems, except with respect to some government buildings. The service work that we do, which is discussed further below, usually does not give rise to lien rights.

We also perform larger projects. Taken together, projects with contract prices of $1 million or more totaled $5.4 billion of aggregate contract value as of December 31, 2021, or approximately 87%, out of a total contract value for all projects in progress of $6.3 billion. Generally, projects closer in size to $1 million will be completed in one year or less. It is unusual for us to work on a project that exceeds two years in length.

A stratification of projects in progress as of December 31, 2021, by contract price, is as follows:

​​​​​​​
​​Aggregate
​​​​Contract
​​No. of​Price Value
Contract Price of Project​Projects​(millions)
Under $1 million6,864​$841.0​
$1 million - $5 million679​1,527.5​
$5 million - $10 million158​1,084.8​
$10 million - $15 million53​661.2​
Greater than $15 million77​2,167.6​
Total7,831​$6,282.1​

​

In addition to project work, approximately 13.3% of our revenue represents maintenance and repair service on already installed HVAC, electrical, and controls systems. This kind of work usually takes from a few hours to a few days to perform. Prices to the customer are based on the equipment and materials used in the service as well as technician labor time. We usually bill the customer for service work when it is complete, typically with payment terms of up to thirty days. We also provide maintenance and repair service under ongoing

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Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk primarily related to potential adverse changes in interest rates, as discussed below. We are actively involved in monitoring exposure to market risk and continue to develop and utilize appropriate

risk management techniques. We are not exposed to any other significant financial market risks, including commodity price risk, or foreign currency exchange risk from the use of derivative financial instruments. At times, we use derivative financial instruments to manage our interest rate risk.

We have exposure to changes in interest rates under our senior credit facility. Our debt with fixed interest rates consists of notes to former owners of acquired companies.

The following table presents principal amounts (stated in thousands) and related average interest rates by year of maturity for our debt obligations and their indicated fair market value at December 31, 2021:

​​​​​​​​​​​​​​​​​​​​​​​
​Twelve Months Ended December 31,​​​​​​​
​20222023202420252026ThereafterTotal
Fixed Rate Debt​$2,704​$12,900​$12,800​$19,550​$—​$—​$47,954​
Average Interest Rate​2.6%​2.6%​2.5%​2.5%​—​—​2.5%​
Variable Rate Debt​$—​$15,000​$22,500​$302,500​$—​$—​$340,000​

The weighted average interest rate applicable to the borrowings under the revolving credit facility was approximately 1.4% as of December 31, 2021. The weighted average interest rate applicable to the term loan was approximately 1.4% as of December 31, 2021.

We measure certain assets at fair value on a nonrecurring basis. These assets are recognized at fair value when they are deemed to be other-than-temporarily impaired. We did not recognize any impairments in the current year on those assets required to be measured at fair value on a nonrecurring basis.

The valuation of the Company’s contingent earn-out payments is determined using a probability weighted discounted cash flow method. This analysis reflects the contractual terms of the purchase agreements (e.g., minimum and maximum payment, length of earn-out periods, manner of calculating any amounts due, etc.) and utilizes assumptions with regard to future cash flows, probabilities of achieving such future cash flows and a discount rate.

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Item 8. Financial Statements and Supplementary Data

INDEX TO FINANCIAL STATEMENTS

​ HIDDEN_ROW
​Page
Comfort Systems USA, Inc.​​
Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)​44
Report of Independent Registered Public Accounting Firm (PCAOB ID No. 42)​46
Consolidated Balance Sheets​47
Consolidated Statements of Operations​48
Consolidated Statements of Stockholders’ Equity​49
Consolidated Statements of Cash Flows​50
Notes to Consolidated Financial Statements​51

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​

​

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Report of Independent Registered Public Accounting Firm

​

To the stockholders and the Board of Directors of Comfort Systems USA, Inc.

​

Opinion on the Financial Statements

​

We have audited the accompanying consolidated balance sheet of Comfort Systems USA, Inc. and subsidiaries (the “Company”) as of December 31, 2021, the related consolidated statements of operations, stockholders’ equity and cash flows, for the year ended December 31, 2021, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2021, and the results of its operations and its cash flows for the year ended December 31, 2021, in conformity with accounting principles generally accepted in the United States of America.

​

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 23, 2022, expressed an unqualified opinion on the Company’s internal control over financial reporting.

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Basis for Opinion

​

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

​

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audit included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audit provides a reasonable basis for our opinion.

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Critical Audit Matter

​

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

​

Revenue from Contracts with Customers – Refer to Notes 2 and 3 to the consolidated financial statements

​

Critical Audit Matter Description

​

The Company recognizes revenue based on the extent of progress towards completion of the performance obligation. The Company generally uses the cost to cost measure of progress for its contracts, as it depicts the transfer of assets to the customer that occurs as the Company incurs costs, which include labor, materials, subcontractors’ costs, other direct costs, and an allocation of indirect costs. Under the cost to cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenue, including estimated fees or profits, is recorded proportionally as costs are incurred.

Due to the nature of the work required to be performed on many of the performance obligations, the estimation of costs at completion is complex, subject to many variables and requires considerable judgment.

Given the judgments necessary to account for the Company’s contracts with customers, specifically the use of estimates, such as total costs to be incurred at contract completion, which are complex and subject to many variables, auditing the corresponding balances and related accounting estimates required extensive audit effort due to the complexity of these estimates, and a high degree of auditor judgment when performing audit procedures and evaluating the results of those procedures.

​

How the Critical Audit Matter was Addressed in the Audit

Our audit procedures related to management’s estimates and judgments included within the Company’s estimated total costs at completion, included the following, among others:

●We tested the operating effectiveness of controls over the recognition of revenue, including those over the determination of estimated costs at completion of the contracts (including the estimated progress toward completion).
●We evaluated quarter over quarter changes in contract profit estimates for a selection of contracts by obtaining explanations from Company’s management regarding timing and amount and corroborating these inquiries by inspecting documents, including management work plans, customer communications, change orders, vendor invoices, and supplier or subcontractor communications.
●We developed an independent expectation of recorded revenue at certain operating units using analytical procedures and considering relevant current and historical information and compared our expectations to the recorded revenue for the operating unit.
●For a sample of contracts with customers, we performed the following:
oEvaluated the reasonableness of management’s estimates of total costs and profit at completion for selected contracts with customers by:
◾Evaluating management’s ability to estimate total costs at completion for each selected contract by performing corroborating inquiries with the Company’s project managers and personnel involved with the selected contracts, and comparing the estimates to management’s work plans, suppliers’ contracts, and/or engineering specifications.

| | ◾ | Comparing management’s estimates to supporting documents such as purchase orders, subcontract agreements, third-party invoices from suppliers, historical actual results, and other sources, as applicable. | | --- | ---

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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

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Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our executive management is responsible for ensuring the effectiveness of the design and operation of our disclosure controls and procedures. We carried out an evaluation under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934) are effective as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting

There have not been any changes in our internal control over financial reporting (as such term is defined in Rules 13a 15(f) and 15d 15(f) under the Securities Exchange Act of 1934) during the three months ended December 31, 2021 that have materially affected, or are reasonably likely to materially affect, internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2021 based on the framework in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO 2013 framework). Based on that evaluation, our management concluded that our internal control over financial reporting was effective as of December 31, 2021.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

The Company acquired Amteck Holdco LLC (“Amteck”) in August 2021 and Ivey Mechanical Company, LLC (“Ivey”), MEP Holding Co., Inc. (“MEP Holdings”), Thermal Equipment Service, Inc. and TES Controls, LLC (collectively “Thermal”) and Kodiak Labor Solutions, LLC (“Kodiak”) in December 2021. Due to the recent nature of these business combinations, Amteck, Ivey, MEP Holdings, Thermal and Kodiak’s internal control over financial reporting and related processes have not been fully integrated into the Company’s existing systems and internal control over financial reporting as of December 31, 2021. As such, our management has excluded Amteck, Ivey, MEP Holdings, Thermal and Kodiak from its assessment of the effectiveness of internal control over financial reporting as of December 31, 2021. Collectively, Amteck, Ivey, MEP Holdings, Thermal and Kodiak comprised 18.3% of total assets and 3.2% of revenues in our consolidated financial statements as of and for the year ended December 31, 2021.

Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which is included elsewhere herein, has issued an attestation report auditing the effectiveness of our internal control over financial reporting as of December 31, 2021.

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Report of Independent Registered Public Accounting Firm

​

To the stockholders and the Board of Directors of Comfort Systems USA, Inc.

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Opinion on Internal Control over Financial Reporting

​

We have audited the internal control over financial reporting of Comfort Systems USA, Inc. and subsidiaries (the “Company”) as of December 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

​

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements for the year ended December 31, 2021, of the Company and our report dated February 23, 2022, expressed an unqualified opinion on those financial statements.

​

As described in Management’s Report on Internal Control over Financial Reporting, management excluded from its assessment the internal control over financial reporting at Amteck Holdco LLC (acquired August 1, 2021), Ivey Mechanical Company, LLC (acquired December 1, 2021), MEP Holding Co., Inc., Thermal Equipment Service, Inc. and TES Controls, LLC, and Kodiak Labor Solutions, LLC (each acquired December 31, 2021), and whose financial statements collectively constitute 18.3% of total assets and 3.2% of total revenues in the consolidated financial statement amounts as of and for the year ended December 31, 2021. Accordingly, our audit did not include the internal control over financial reporting at Amteck Holdco LLC, Ivey Mechanical Company, LLC, MEP Holding Co., Inc., Thermal Equipment Service, Inc. and TES Controls, LLC, and Kodiak Labor Solutions, LLC.

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Basis for Opinion

​

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

​

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

​

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

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Definition and Limitations of Internal Control over Financial Reporting

​

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

​

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

​

/s/ Deloitte & Touche LLP

​

Houston, Texas

February 23, 2022

Item 9B. Other Information

None.

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Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

PART III

Item 10. Directors, Executive Officers and Corporate Governance

We have adopted a code of ethics that applies to our principal executive officer, our principal financial officer, and our principal accounting officer, as well as to our other employees. This code of ethics consists of our Code of Conduct. The Company has made this code of ethics available on our website, as described in Item 1 of this annual report on Form 10-K. If we make substantive amendments to this code of ethics or grant any waiver, including any implicit waiver, we will disclose the nature of such amendment or waiver on our website or in a report on Form 8-K within four business days of such amendment or waiver.

The other information called for by this item has been omitted in accordance with the instructions to Form 10-K. The Company will file with the Commission a definitive proxy statement including the other information to be disclosed under this item in the 120 days following December 31, 2021 and such information is hereby incorporated by reference.

ITEMS 11, 12, 13 AND 14.

These items have been omitted in accordance with the instructions to Form 10-K. The Company will file with the Commission a definitive proxy statement including the information to be disclosed under the items in the 120 days following December 31, 2021 and such information is hereby incorporated by reference.

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PART IV

Item 15. Exhibits and Financial Statement Schedules

(a)The following documents are filed as part of this annual report on Form 10-K:
(1)Consolidated Financial Statements: The Index to the Consolidated Financial Statements is included under Part II, Item 8 of this annual report on Form 10-K and is incorporated herein by reference.
(2)Financial Statement Schedules:

None.

(b)Exhibits

Reference is made to the Index of Exhibits immediately following the signature page thereof, which is incorporated herein by reference.

(c)Excluded financial statements:

None.

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Item 16. Form 10-K Summary

None.

​

INDEX OF EXHIBITS

​​​​Incorporated by Referenceto the Exhibit Indicated Belowand to the Filing with the****Commission Indicated Below
Exhibit****NumberDescription of ExhibitsExhibit****NumberFiling or File Number
3.1​Second Amended and Restated Certificate of Incorporation of the Registrant​3.1​333-24021
3.2​Certificate of Amendment dated May 21, 1998​3.2​1998 Form 10-K
3.3​Certificate of Amendment dated July 9, 2003​3.3​2003 Form 10-K
3.4​Certificate of Amendment dated May 20, 2016​3.1​May 20, 2016 Form 8-K
3.5​Amended and Restated Bylaws of Comfort Systems USA, Inc.​3.1​March 25, 2016 Form 8-K
4.1​Form of certificate evidencing ownership of Common Stock of the Registrant​4.1​333-24021
4.2​Description of Registrant’s Securities​4.2​2019 Form 10-K
*10.1​Employment Agreement between the Company, Eastern Heating & Cooling, Inc. and Alfred J. Giardinelli, Jr.​10.1​Second Quarter 2003 Form 10-Q
*10.2​Form of Comfort Systems USA, Inc. Executive Severance Policy​10.3​First Quarter 2008 Form 10-Q
*10.3​Form of Directors and Officers Indemnification Agreement​10.1​May 19, 2009 Form 8-K
10.4​Second Amended and Restated Credit Agreement by and among Comfort Systems USA, Inc., as Borrower and Wells Fargo Bank, National Association, as Administrative Agent/Wells Fargo Securities LLC, as Sole Lead Arranger and Sole Lead Book Runner/Bank of Texas, N.A., Capital One, N.A., and Regions Bank as Co-Syndication Agent/and Certain Financial Institutions as Lenders​10.1​July 22, 2010 Form 8-K/A
10.5​Stock Purchase Agreement, dated July 28, 2010​10.1​July 30, 2010 Form 8-K
10.6​Amendment No. 1 to Second Amended and Restated Credit Agreement, Second Amended and Restated Security Agreement, and Second Amended and Restated Pledge Agreement​10.1​Third Quarter 2011 Form 10-Q
10.7​Amendment No. 2 to Second Amended and Restated Credit Agreement and Amendment to Other Loan Documents​10.1​Second Quarter 2013 Form 10-Q
*10.8​Form of Option Award under the Comfort Systems USA, Inc. 2012 Equity Incentive Plan​10.33​2014 Form 10-K
10.9​Amendment No. 3 to Second Amended and Restated Credit Agreement and Amendment to Other Loan Documents​10.1​Third Quarter 2014 Form 10-Q
10.10​Agreement and Plan of Merger between the Company and Dyna Ten Corporation, dated April 9, 2014​10.1​April 9, 2014 Form 8-K
*10.11​Form of Amended Change in Control Agreement​10.1​Third Quarter 2015 Form 10-Q
10.12​Amendment No. 4 to Second Amended and Restated Credit Agreement and Amendment to Other Loan Documents​10.40​2015 Form 10-K
*10.13​Form of 2016 Stock Option Notice​10.3​March 25, 2016 Form 8-K
*10.14​Resignation and General Release Agreement between the Company and James Mylett, dated as of January 10, 2017​10.1​January 11, 2017 Form 8-K

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​

​

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​​​​Incorporated by Referenceto the Exhibit Indicated Belowand to the Filing with the****Commission Indicated Below
Exhibit****NumberDescription of ExhibitsExhibit****NumberFiling or File Number
10.15​Stock Purchase Agreement, dated February 21, 2017, by and among the Company, BCH, the Selling Shareholders and Daryl Blume, in his capacity as representative of the Selling Shareholders​2.1​February 23, 2017 Form 8-K
10.16​Form of Promissory Note, dated April 1, 2017, issued by the Company in favor of each of the Selling Shareholders​10.1​April 3, 2017 Form 8-K
*10.17​2017 Omnibus Incentive Plan​A​April 10, 2017 Proxy Statement
*10.18​2017 Senior Management Annual Performance Plan​B​April 10, 2017 Proxy Statement
*10.19​Form of Restricted Stock Unit Agreement under the Company’s 2012 Equity Incentive Plan​10.2​First Quarter 2017 Form 10-Q
*10.20​Form of Stock Option Notice under the Company’s 2012 Equity Incentive Plan​10.3​First Quarter 2017 Form 10-Q
*10.21​Form of Dollar-denominated Performance Restricted Stock Unit Agreement under the Company’s 2012 Equity Incentive Plan​10.4​First Quarter 2017 Form 10-Q
*10.22​Form of Restricted Stock Unit Agreement under the Company’s 2017 Omnibus Incentive Plan​10.1​First Quarter 2018 Form 10-Q
*10.23​Form of Stock Option Notice under the Company’s 2017 Omnibus Incentive Plan​10.2​First Quarter 2018 Form 10-Q
*10.24​Form of Dollar-denominated Performance Restricted Stock Unit Agreement under the Company’s 2017 Omnibus Incentive Plan​10.3​First Quarter 2018 Form 10-Q
10.25​Amendment No. 5 to Second Amended and Restated Credit Agreement and Amendment to Other Loan Documents​10.1​Second Quarter 2018 Form 10-Q
10.26​Purchase Agreement, dated February 21, 2019, by and among the Company, Walker, the Shareholder Sellers and Scott Walker, in his capacity as representative of the Shareholder Sellers​2.1​February 26, 2019 Form 8-K
10.27​Amendment No. 6 to Second Amended and Restated Credit Agreement and Amendment to Other Loan Documents​10.56​2019 Form 10-K
10.28​Agreement and Plan of Merger dated as of March 9, 2020 among Comfort Systems USA, Inc., OSC Acquisition Corp., TAS Energy Inc., and Element Partners II, L.P., as Stockholder Representative​2.1​March 13, 2020 Form 8-K
16.1​Letter to Securities and Exchange Commission from Ernst & Young LLP, dated March 15, 2021​16.1​March 15, 2021 Form 8-K
21.1​List of subsidiaries of Comfort Systems USA, Inc.​​​Filed Herewith
23.1​Consent of Deloitte & Touche LLP​​​Filed Herewith
23.2​Consent of Ernst & Young LLP​​​Filed Herewith
31.1​Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002​​​Filed Herewith
31.2​Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002​​​Filed Herewith
32.1​Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002​​​Furnished Herewith
32.2​Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002​​​Furnished Herewith

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​

​​​​Incorporated by Referenceto the Exhibit Indicated Belowand to the Filing with the****Commission Indicated Below
Exhibit****NumberDescription of ExhibitsExhibit****NumberFiling or File Number
101.INS​Inline XBRL Instance Document​​​Filed Herewith
101.SCH​Inline XBRL Taxonomy Extension Schema Document​​​Filed Herewith
101.CAL​Inline XBRL Taxonomy Extension Calculation Linkbase Document​​​Filed Herewith
101.DEF​Inline XBRL Taxonomy Extension Definition Linkbase Document​​​Filed Herewith
101.LAB​Inline XBRL Taxonomy Extension Label Linkbase Document​​​Filed Herewith
101.PRE​Inline XBRL Taxonomy Extension Presentation Linkbase Document​​​Filed Herewith
104​Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document)​​​​
*Management contract or compensatory plan.

​

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

​​​
​COMFORT SYSTEMS USA, INC.
​​​
​By:/s/ BRIAN E. LANE
​​Brian E. Lane
​​President and Chief Executive Officer
Date: February 23, 2022​​

​

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

SignatureTitleDate
​​​​​​
/s/ Brian E. Lane​President, Chief Executive Officer, and​February 23, 2022​
Brian E. Lane​Director (Principal Executive Officer)​​​
​​​​​​
/s/ William George​Executive Vice President and Chief Financial​February 23, 2022​
William George​Officer (Principal Financial Officer)​​​
​​​​​​
/s/ Julie S. Shaeff​Senior Vice President and Chief Accounting​February 23, 2022​
Julie S. Shaeff​Officer (Principal Accounting Officer)​​​
​​​​​​
/s/ Franklin Myers​Chairman of the Board​February 23, 2022​
Franklin Myers​​​​​
​​​​​​
/s/ Darcy G. Anderson​Director​February 23, 2022​
Darcy G. Anderson​​​​​
​​​​​​
/s/ Herman E. Bulls​Director​February 23, 2022​
Herman E. Bulls​​​​​
​​​​​​
/s/ Alan P. Krusi​Director​February 23, 2022​
Alan P. Krusi​​​​​
​​​​​​
/s/ Pablo G. Mercado​Director​February 23, 2022​
Pablo G. Mercado​​​​​
​​​​​​
/s/ William J. Sandbrook​Director​February 23, 2022​
William J. Sandbrook​​​​​
​​​​​​
/s/ Constance E. Skidmore​Director​February 23, 2022​
Constance E. Skidmore​​​​​
​​​​​​
/s/ Vance W. Tang​Director​February 23, 2022​
Vance W. Tang​​​​​
​​​​​​
/s/ Cindy L. Wallis-Lage​Director​February 23, 2022​
Cindy L. Wallis-Lage​​​​​

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