ACDoctor
Air-Conditioning, Heating and Refrigeration Institute (AHRI)
American Gas Association (AGA)
American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE)
Association professionnels chauffage (APC)Association of Home Appliance Manufacturers (AHAM)
Atlantic Building Supply Dealers Association (ABSDA)
Canadian Hardware and Housewares Manufacturers Association (CHHMA)
Canadian Institute of Plumbing & Heating (CIPH)
Canadian Oil Heat Association (COHA)
Chimney Safety Institute of America (CSIA)
Canadian Standards Association (CSA)
CSA International (CSA)
Electrical Generating Systems Association
Gas Appliance Manufacturer's of America (GAMA)
Gas Research Institute (GRI)
Heating, Airconditioning & Refrigeration Distributors International (HARDI)
Hearth, Patio & Barbeque Association Canada (HPBAC)
Hearth, Patio & Barbeque Association (HPBA)
Heating Refrigeration Air Conditioning Institute (HRAI)
International Association of Plumbing and Mechanical Officials (IAPMO)
International Code Council (ICC)
North American Association of Food Equipment Manufacturers (NAFEM)
National Chimney Sweep Guild (NCSG)
National Fire Protection Association (NFPA)
North American Retail Hardware Association (NRHA)
Underwriters Laboratories, Inc. (UL)