• ACCA The Air Conditioning Contractors of America
  
• ARI The Air Conditioning & Refrigeration Institute
  
• ABMA American Boiler Manufacturers Association
  
• AGA American Gas Association
  
• AGCC American Gas Cooling Center
  
• ASHRAE American Society Heating Refrigeration Air Conditioning Engineers
  
• GAMA Gas Appliance Mfrs Association
  
• GRI Gas Research Institute
  
• GHPC Geothermal Heat Pump Consortium
  
• NEMA National Electrical Manufacturers Association
  
• NATE North American Tech. Excellence
  
• RSES Refrigeration Service Engineers Society
  
• SMACNA Sheetmetal Union

Periodicals

• Contracting Business Magazine
  
• Heating Piping Air Conditioning Magazine
  
• HVAC Job Online
  
• HVAC Mall
  
• HVAC Online
  Western HVACR News - Western U.S. HVAC News
• The News Magazine

• AAON Commercial rooftop HVAC products
• Addison Residential & light commercial HVAC
• products
• AirEase/Armstrong Residential HVAC products
• AirKontrol Air filtration products
• AirPac Specialty cooling products
• Amana Residential HVAC products & home appliances
• American Geothermal Ground source heat pumps
• American-Standard Residential & light commercial HVAC products
• Amtrol Hot water heating accessories & indirect water heater tanks
• A O Smith Water heaters
• Andover Commercial controls
• Arcoaire Residential HVAC products
• Bacharach Test equipment
  
• BAC Commercial A/C cooling towers
• Bard Residential HVAC products
  
• Beckett Oil burners
  
• Bell & Gossett Pumps
  
• Bradford White Water heaters
• Bristol A/C & refrigeration compressors
• Bryan Boilers
• Bryant Residential HVAC products
• Burnham Boilers
• Carrier Residential & commercial HVAC products
• California Economizer HVAC zone control systems
• Calmac Commercial A/C ice storage systems
• Cleaver-Brooks commercial boilers
• Commandaire Water source heat pumps
• Copeland A/C and refrigeration compressors
• Delta Cooling Towers commercial products
• Dunham-Bush Commercial HVAC products
• Dunkirk Boilers
• DuPont Refrigerant manufacturer
• Easy Air Specialty electric heating products
• Econar Water source heat pumps
• Elf-Atochem Refrigerant manufacturer
• Elite HVAC software
• EMI Mini-splits and PTAC/PTHP systems
• Energy Kinetics Boilers
• Evapco commercial cooling towers
• EWC Zone controls and humidifiers
• Field Controls HVAC accessories
• Florida Heat Pump Water source heat pumps
  
• First Company Specialty products & air handlers
• Fresh Air SolutionsCommercial energy recovery products
• Glasfloss Air filtration products
• Goettl Residential HVAC products
• Governair commercial HVAC products
• Grundfos Pumps
• Hart & Cooley Registers, grilles, venting products
• Hermidifier Home humidifiers
• Honeywell Thermostats, air cleaners & other accessories
• Ice Cap PTAC/PTHP units
• Infloor Radiant heat products
• Islandaire PTAC/PTHP units
• Johnson Commercial controls
• Lake Air Air cleaners
• Lau Blower components
• Lennox Residential HVAC products
• Liebert Specialty commercial HVAC
• Magicaire HVAC coils & air handlers
• Mammoth commercial HVAC products
• Maritime Geothermal Water source heat pumps
• Marley Commercial A/C cooling towers
• Marlo Coil HVAC coils & air handlers
• Microworks HVAC load calc and cost analysis software
• Mammoth Commercial HVAC products
• McQuay Commercial HVAC products
• Monitor Products Home heaters
• Nordyne Residential HVAC products
• Payne Residential HVAC prdoucts
• RP Research Products, makers of Aprilaire & SpaceGard
• Rheem/Ruud Residential HVAC products
• Rinnai Home heaters
  
• Robertshaw Controls & zoning products
  
• Robur Residential & light commercial gas A/C
  
• Samsung Mini split & window units
• Seasons4 Specialty commercial rooftop units
• Servtech Software for contractors
• Skuttle Home humidifiers
• Slant/Fin Boilers
• Space Pak High velocity duct systems
• Tadiran Mini-split HVAC units
• Tecumseh A/C & refrigeration compressors
• Tempstar/Heil Residential HVAC products
• Texas Cooling Tower Commercial HVAC cooling towers
• Tower Tech Commercial HVAC cooling towers
• Trane Residential & commercial HVAC products
• Trion Air filtration products
• Trol-a-temp Zone controls
• Unico High velocity duct systems
• Viessmann Boilers
• Vilter Commercial HVAC & refrigeration products
• Waterfurnace Water source heat pumps
• WeatherKing Residential HVAC products
• Weil-McLain Boilers
• White-Rodgers HVAC controls & thermostats
• Wirsbo Radiant heat products
  
• York Residential & commercial HVAC products