Comfort Systems USA provides mechanical and electrical contracting services through 50 operating units with 190 locations in 142 cities across the United States. Its mechanical segment covers HVAC, plumbing, piping, controls, off-site construction, monitoring, and fire protection; its electrical segment covers installation and servicing of electrical systems. The company primarily serves commercial, industrial, and institutional customers in manufacturing, healthcare, education, office, technology, retail, and government facilities.
In 2025, mechanical services represented 73.3% of consolidated revenue and electrical services 26.7%. Approximately 63.2% of revenue came from installation in newly constructed facilities, with the remaining 36.8% from renovation, maintenance, repair, and replacement in existing buildings. The company delivers projects through both "design and build" and "plan and spec" methods, with design-and-build engagements using a consultative approach with building owners.
New Construction 63% · Existing Building Construction 23% · Service Calls Maintenance And Monitoring 7% · Service Projects 6%
business segments · FY2025 (ended Dec 2025) · share of tagged segment revenue (10-K XBRL, as filed)
