- A-Comfort Service - offers residential and commerical services.
- Allen-Sherman-Hoff - supplier of boiler cleaning equipment and ash handling systems.
- Applied Radiant Technologies - distributors of hydronic (hot water) and electric radiant infloor heating, floor warming and snow and ice melting systems.
- Bell Supply Co, Inc. - distributor of plumbing, heat, air conditoning, HVAC, and bath and kitchen supplies.
- Beverly Heating and Cooling, Inc. - sells, services, and installs both residential and commercial heating, cooling, ventilating, humidifying, and air cleaning equipment.
- Boyer Refrigeration Heating & Air Conditioning, Inc. - commercial refrigeration, residential & commercial heating and air conditioning.
- Brubaker, Inc. - offering a variety of mechanical contracting services, including plumbing, HVAC, water conditioning, appliances, bathroom/kitchen remodelling, and more.
- Bruder Schaper Associates - executive search and recruiting firm dedicated to the HVAC, energy services, building automation, and lighting industries nationwide.
- Burnham Boilers - producer of boilers and related accessories for residential, commercial and industrial applications
- Calco, Inc. - distributor of products used primarily in HVAC, manufacturing chemical processing, process control, environmental, ship building industries.
- Chase & Associates, Inc. - represents the leading manufacturers of heating and air conditioning equipment in the HVAC industry.
- Climatec - offers hydronic heating with emphasis on radiant floors.
- Crawford Supply Group - Plumbing, heating & kitchen cabinets in Illinois, Wisconsin, Michigan, Ohio & Pennsylvania with 28 locations. Made up of Inland Supply, Paragon Supply, Builders Plumbing & Heating Supply of Wisconsin, K.D.A. (Kitchen Distributors of America) of Wisconsin, Builders Plumbing & Heating Supply of Michigan, Builders Heating Supply of Ohio, North Star Plumbing of Ohio, Plumbers Equipment Company & Crawford Supply Company.
- DC Fabricators, Inc. - supplying design and manufacturing technology for steam condensers and heat exchangers for marine and power generation.
- DGH Systems - A leading manufacturer of industrial/commercial and residential humidifiers and the North American distributor for Carel OEM controls.
- Dannix Group Inc., The - serving eastern Pennsylvania and central New Jersey.
- Donlee Technologies, Inc. - produces packaged steam and hot water boilers, a broad range of heating, ventilating and air conditioning equipment, pressure vessels, and more.
- DuctMate Industries, Inc. - duct connections, access doors, duct hangers, reinforcement angles, turning vanes, rails and duct sealants.
- Duvall Heating & Air Conditioning & Warm Traditions Stove Shoppe - sales, installation and service of home comfort and environmental control systems to heat, cool, clean, humidify and dehumidify.
- Flatplate, Inc. - manufacturer of brazed plate heat exchangers.
- Fluidics, Inc. - diversified mechanical/service contractor with clients throughout Pennsylvania, New Jersey, and
Delaware.
- Freezing Equipment Sales, Inc. (FES) - suppliers of equipment and systems in the industrial refrigeration industry.
- GE Mechanical, Inc. - offers professional mechanical contracting services.
- Hannabery HVAC - sales and service of gas, electric, oil, heat pumps and custom ductwork. Serving east Pennsylvania and parts of New Jersey.
- Jaybird Manufacturing, Inc. - providing fogging equipment for humidification, evaporative cooling, and chemical
application.
- Marvin E. Kanze, Inc. - offers installation and service of HVAC equipment.
- Leggett, Inc
- Linc Corporation - business-format franchisor of an operating system known as the LINC System for commercial HVAC service.
- Mahoning Outdoor Furnaces - heating homes or businesses with firewood, propane, oil, coal, agricultural or yard
waste.
- Ernest D. Menold - a sheet metal contractor and specialty fabricator primarily serving pharmaceutical and industrial
customers.
- F.J. McLaughlin Plumbing, Heating, and Air Conditioning, Inc. - offers custom plumbing and HVAC installations.
- National Energy Control Corporation - worldwide source for controls and accessories.
- National Refrigerants - independent worldwide distributor of refrigerants and all associated refrigerant management
services
- Olsen Technology Inc. - makers of heating and cooling systems, including oil and gas furnaces.
- Penn Fan, Inc. - manufacturer of industrial man cooling fans, crane cab fans, exhaust fans and custom air moving
equipment.
- Penn Ventilator - offering blowers, cabinet, centrifugal, inline, and propeller fans.
- Powerhouse Equipment and Engineering Co., Inc. - rents, sells, installs, and services boilers throughout the eastern United States, Canada, and the Caribbean.
- Pressure-Tech - designing/building multi-fuel fired boilers for home and business.
- Riley Sales, Inc. - distributors of heating and air conditioning equipment, flexible hose & tubing, pre-fab chimney, insulation, power and hand tools, sheet metal fabrication machinery, air humidifiers and condensate fans and ventilation adhesives and sealants
- RAS Process Equipment Manufacturing - manufacturer of custom process equipment, including heat exchangers, reactors and columns.
- SMS Distributors - full line stocking distributor of Z-Flex chimney lining products.
- Shearer Heating & Air Conditioning, Inc. - serving the residential and commercial markets.
- Shur-Kut Corporation Heat Transfer Division - manufacturer of custom heat transfer products.
- J.A. Smith Heating and Air Conditioning, Inc. - residential and commercial services.
- Sunteq/Enviroteq - manufacturers and distributors of geothermal heat pump energy systems.
- Jay J. Surkin Company - manufacturers' representative for commercial HVAC equipment, serving Eastern and Central PA, Southern NJ, and DE.
- Union Fuel - offering gas heating, oil heating, and air-duct cleaning supplies and services.
- United Refrigeration, Inc. - worldwide distributors of refrigeration, air conditioning, and heating parts & equipment. Includes a full online catalog.
- WSMW Industries, Inc. - specializing in metal fabrication, pipefitting, HVAC, welding, electricial, plumbing, roofing, millwrighting and more.
- J J White, Inc. - offering construction management, mechanical construction, HVAC maintenance, and more.
- Williard, Inc. - the largest specialty contractor in the Greater Philadelphia Region offering comprehensive mechanical and electrical services to commercial, industrial, and institutional customers since 1945.
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