- Hannabery HVAC - sales and service of gas, electric, oil, heat pumps and custom ductwork. Serving east Pennsylvania and parts of New Jersey.
- Jay J. Surkin Company - manufacturers' representative for commercial HVAC equipment, serving Eastern and Central PA, Southern NJ, and DE.
- F. J. McLaughlin Plumbing, Heating, and Air Conditioning, Inc. - offers custom plumbing and HVAC installations.
- Calco, Inc. - distributor of products used primarily in HVAC, manufacturing chemical processing, process control, environmental, ship building industries.
- Climatec - offers hydronic heating with emphasis on radiant floors.
- Union Fuel - offering gas heating, oil heating, and air-duct cleaning supplies and services.
- J J White, Inc. - offering construction management, mechanical construction, HVAC maintenance, and more.
- Bell'Supply Co, Inc. - distributor of plumbing, heat, air conditoning, HVAC, and bath and kitchen supplies.
- WSMW Industries, Inc. - specializing in metal fabrication, pipefitting, HVAC, welding, electricial, plumbing, roofing, millwrighting and more.
- Marvin E. Kanze, Inc. - offers installation and service of HVAC equipment.
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