Item 2. PROPERTIES

We operate approximately 1,200 sites, which comprise approximately 37 million square feet of productive space. Of these, our facilities and key manufacturing sites greater than 100,000 square feet comprise approximately 27 million square feet of productive space. Approximately 60%, 18% and 18% of these significant properties are associated with our HVAC, Refrigeration and Fire & Security segments, respectively, with approximately 4% not associated with a particular segment. Approximately 35% of these significant properties are leased and the remainder are owned. Approximately 32% of these significant properties are located in the U.S.

Our fixed assets as of December 31, 2021 include manufacturing facilities and non-manufacturing facilities, such as warehouses and machinery and equipment, most of which is general purpose machinery and equipment that use special jigs, tools and fixtures and that, in many instances, have automatic control features and special adaptations. The facilities, warehouses, machinery and equipment in use as of December 31, 2021 are in good operating condition, are well-maintained and substantially all are in regular use.