- Air Comfort Corporation
 - Provider of turnkey commercial/residential HVAC systems, process piping and industrial sheetmetal. - Airtron Heating and Air Conditioning
- Installing and service contractors in the Midwest, FL, and TX.
 Ambthair Services Ltd.
- Provides air conditioning, heating, and ventilation to businesses throughout Europe and Asia. Particularly experienced in the air conditioning of sound, television, and film studios.- APS Hoods
- Offers state-of-the-art hood and kitchen cleaning systems to restaurants and facilities across the U.S. Also offer fire-system installations, steam pressure washing, baffle filters, and more.
- Arista Air Conditioning Corp.
- Installs and services commercial air conditioning, refrigeration, heating and ventilation systems.
- Batchelors Mechanical Contractors, Inc.
- Performs HVAC, control, plumbing and pipefitting projects in the commercial, industrial, nstitutional, and marine industries. Serving the Southeast.
- Botto Mechanical Corporation
- Designing and installing plumbing, heating, ventilation and air-conditioning systems.
 Burlington Engineering
- Services include the installation, commissioning, and aftercare of mechanical, electrical, and HVAC controls systems.- C&D Cooling and Heating Co., Inc.
- Air conditioning and heating contractors, serving residential, commercial, and industrial settings in the northern New Jersey area.
- Climate Facilities
- Provides air conditioning system installation and maintenance services for the London area.
- Colt International Limited
- Provider of smoke control and architectural and climate control systems, products, and services.
- Comfort Zone Air Conditioning & Heating
- Repair, service, sales, installation, and more.
- Continental Refrigeration, Heating & Air Conditioning
- Refrigeration, heating and air contractor.
- Cox Heating and Air Conditioning, Inc.
- Design, sales, installation, service and repair of residential and industrial air conditioning and indoor air cleaning systems.
- D&H Climate Control
- Air conditioning and heating service and sales.
- Dome-Tech Engineering
- Specialises in field and design engineering of HVAC and site utility systems.
- DualStar Technologies Corporation
- Designs and installs HVAC systems for urban, high-rise buildings.
- Environmental Systems Associates
- Services residential air conditioning and cooling systems, heatpumps, gas furnaces, and more.
- Frontline Engineered Services
- Provides commercial and residential HVAC (Heating, Ventilation, Air Conditioning) and plumbing services for Maryland and the Washington, D.C. area.
- Ground Loop Heating and Air Conditioning Co.
- Selling and installing Geothermal heat pumps. Serving MD, NJ, PA, DE, VA, and WVA.
- Hermanson Corporation
- HVAC and sheetmetal contractor serving the Northwest.
- Horgan & Son Ltd
- Offers services associated with industrial, commercial, educational, pharmaceutical, and health care buildings.
- Kahoe Air Balance
- Testing, balancing, and commissioning heating, ventilating and air conditioning systems.
- Linc Corporation
- Business-format franchisor of an operating system known as the LINC System for commercial HVAC service.
- Modern Piping, Inc.
- Offers standard plumbing, HVAC, complex building control, and speciality piping systems.
- New Comfort Systems
- Heating and cooling system installation and renovation company serving the Northeast.
- Perfection Group
- Mechanical and service contractor with offices in Cincinnati, Louisville, Lexington, Knoxville, Indianapolis, Parkersburg, and Charleston.
- Roth Bros., Inc.
- Divisions include HVAC, facilities automation, lighting systems. Other services include metal fabrication, architectural sheet metal, and energy services. Serving the Eastern U.S.
- Sandium Heating & Air Conditioning
- Heating, cooling, and air conditioning equipment installation and repair. Sandium serves the HVAC needs of industrial, commercial, and residential customers.
- Sartron LLC
- Authorised service centre for major brands of variable frequency drives, adjustable speed drives, and AC drives for CT, NY, NJ, MA, and RI customers.
- Smith & Oby HVAC Construction
- Contractor for heating, air conditioning, plumbing, and process piping projets.
- Sovereign Engineering
- Provides mechanical and electrical services, specialising in heating, ventilation, refrigeration, and air conditioning.
- Trinidad Engineering Inc.
- Provides HVAC heating, ventilation, air conditioning, and refrigeration.
- Tropic-Kool Engineering Corp.
- Installing HVAC systems for fast food businesses.
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