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Acme fans, blowers & ventilation equipment
American Hardware Manufacturers Association
Air Conditioning and Refrigeration Institute
American Supply Association
American Water Works Association
American Society of Heating, Refrigeration & Air Conditioning
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Council of American Building Officials
Canadian Institute of Plumbing and Heating
Copper Development Association
Gas Processors Association
Gas Research Institute
International Assoc. of Plumbing & Mechanical Officials
International Conference of Building Officials
The Manufacturers Standardization Society of the Valve and Fitting Industry(MSS)
Mechanical Contractors Association of America
Nat’l Assoc. of Plumbing, Heating, Cooling Contractors
Nat’l Propane Gas Association
NSF International
Pacific Fire Safety
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Pipe Trades Association
Plastic Pipe & Fittings Association
Plumbing Manufacturers Institute
Manufacturers of rooftop units, coil products
Underwriters Laboratories Inc.


The Air Conditioning, Heating and Refrigeration News
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Oilheating: Journal of Indoor Comfort Marketing
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Plumbing Engineer
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Ductbusters, Inc.
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National Association of Home Builders Research Center
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