We manufacture low-cost, high-value, air-leakage control energy conservation products for the four largest intentional openings in a typical house - the fireplace, the pull-down attic stair, the whole house fan, and the clothes dryer exhaust duct.

A full service mechanical contractor Offering a full line of HVAC services, including complete piping and sheet metal full service department to provide 24 hour on call service and in house engineering for design build, or plan/specification services.

Supplier of valves for residential and light commercial plumbing applications. Faucets, valves and plumbing specialties

7AC Technologies is building air conditioning systems that are waste heat and waste water powered. Our membrane based liquid desiccant air conditioner for summer cooling and winter heating can save between 40 to 80% of electricity.

Electregy provides solar, wind, ethanol and power transmission solutions & services. We are developing a new form of cellulosic ethanol. We are an MIT alumni based company with significant technology experience in a wide array of sciences & technologies.

High temperature and corrosion resistant alloy fabrications for the heat treat market

Design and manufacture high performanc thermal management solutions. Products include custom plate-fin heat exchangers, flat-tube heat exchangers, vacuum brazed cold plates, liquid cooled chassis, and value added assemblies.

Design and construct phase change material based solar thermal energy storage devices. They are used to gather heat from sunlight for later use in heating water and air in a home environment.

Electrical Contractors, Power Boiler and Heat Exchanger Manufacturing, Hardware Manufacturing, Bolt, Nut, Screw, Rivet, and Washer Manufacturing, Fluid Power Valve and Hose Fitting Manufacturing

Sanitary Paper Product Manufacturing, Heating Equipment (except Warm Air Furnaces) Manufacturing, Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipmen, Semiconductor and Related Device Manufacturing

Power Boiler and Heat Exchanger Manufacturing, Machine Shops, Heating Equipment (except Warm Air Furnaces) Manufacturing, Other Aircraft Parts and Auxiliary Equipment Manufacturing

Steam and Air-Conditioning Supply, Other Metal Valve and Pipe Fitting Manufacturing, Air Purification Equipment Manufacturing, Heating Equipment (except Warm Air Furnaces) Manufacturing, Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipmen

Water Supply and Irrigation Systems, Bottled Water Manufacturing, Industrial Gas Manufacturing, All Other Basic Inorganic Chemical Manufacturing, Gum and Wood Chemical Manufacturing

Steam and Air-Conditioning Supply, Plumbing, Heating, and Air-Conditioning Contractors, Sheet Metal Work Manufacturing, Industrial and Commercial Fan and Blower Manufacturing, Heating Equipment (except Warm Air Furnaces) Manufacturing

Hydroelectric Power Generation, Fossil Fuel Electric Power Generation, Nuclear Electric Power Generation, Other Electric Power Generation, Electric Bulk Power Transmission and Control

Heating Equipment (except Warm Air Furnaces) Manufacturing, Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

Power Boiler and Heat Exchanger Manufacturing, Heating Equipment (except Warm Air Furnaces) Manufacturing

Power and Communication Line and Related Structures Construction, Plumbing, Heating, and Air-Conditioning Contractors, Plastics Plumbing Fixture Manufacturing, Iron Foundries, Plumbing Fixture Fitting and Trim Manufacturing

Heating Equipment (except Warm Air Furnaces) Manufacturing

Highway, Street, and Bridge Construction, Fabricated Structural Metal Manufacturing, Plate Work Manufacturing, Sheet Metal Work Manufacturing, Ornamental and Architectural Metal Work Manufacturing

Steam and Air-Conditioning Supply, Heating Equipment (except Warm Air Furnaces) Manufacturing, Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipmen

Heating Equipment (except Warm Air Furnaces) Manufacturing

Power Boiler and Heat Exchanger Manufacturing, Other Commercial and Service Industry Machinery Manufacturing, Heating Equipment (except Warm Air Furnaces) Manufacturing, Electric Housewares and Household Fan Manufacturing

Plumbing, Heating, and Air-Conditioning Contractors, Heating Equipment (except Warm Air Furnaces) Manufacturing

Power and Communication Line and Related Structures Construction, Heating Equipment (except Warm Air Furnaces) Manufacturing, Engineering Services