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Thornton Service: Leading commercial HVAC services firm in the Washington, DC area

Thornton Service, Inc. is a leading provider of commercial HVAC service solutions to organizations in the Washington metropolitan area. Specializing in preventive maintenance and repair of commercial heating and cooling systems, Thornton Service supports a range of markets, including healthcare, financial, religious, airports, labs, and mission critical data centers, providing both full service and preventive, maintenance-only HVAC contracts to owner-occupied and managed buildings.

Serving Washington, DC, Montgomery, Prince Georges and Howard Counties in Maryland and Northern Virginia since 1994, Thornton Service keeps clients’ HVAC systems functioning at peak efficiency. Contact Thornton Service whether you need help with just one building or an entire campus or if you are interested in better understanding your building’s energy usage.

Our Services

central air conditioners
  • Heating
  • Air Conditioning
  • Facility Management
  • Emergency Service
  • Special Installations
  • 24×7 Services
  • Customized Preventive Maintenance
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About Our Company


Thornton Service, Inc. was established in 1981 and began its operations as a Linc Service contractor winning the prestigious Linc Contractor of the Year Award in 1993 and 1994. In the early 1990s, Thornton Service, Inc. established a separate division focused specifically on maintaining mechanical systems in biomedical research facilities.

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