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
GRI Gas Research Institute
GHPC Geothermal Heat Pump Consortium
NEMA National Electrical Mfrs. Association
NATE North American Tech. Excellence
RSES Refrigeration Service Engineers Society
SMACNA Sheetmetal union

Resources for HVAC Professionals

All HVAC Info Website with tons of HVAC info & links
Contracting Business Magazine
HeatingHelp THE site for hydronic heating
HVAC-Calc Load calculation software
HVAC Certification Center Training site
HVAC Certification Today Certification & licensing site
HVAC Talk The web's best HVAC forum
HVAC Job Online
HVAC Online
PRESTON GUIDE HVAC equipment reference guides
Quarterstaff Software Work Order Writer program
The News Magazine

Manufacturers & Vendors

AAON Commercial rooftop HVAC products
Addison Residential & light commercial HVAC products
Air & Water HVAC accessories & components
AirEase/Armstrong Residential HVAC products
Air Filter Buy Air filtration 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 commerical HVAC products
Amtrol Hot water heating accessories & indirect water heater tanks
A O Smith Water heaters
Aquacal Pool heat pumps & other accessories
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 Commerical boilers
Coleman Residential HVAC products
Cooling Technologies Small gas fired chillers
Commandaire Water source heat pumps
Copeland A/C and refrigeration compressors
Crown Boilers
Delta Cooling Towers Commerical products
Discount Furnace Filter Air filters & other IAQ products
Dunham-Bush Commercial HVAC products
Dunkirk Boilers
DuPont Refrigerant manufacturer
Easy Air Specialty electric heating products
ECI Manufacturing & testing software
Econar Water source heat pumps
EFM Boiler & furnace manufacturer
Elf-Atochem Refrigerant manufacturer
Elite HVAC software
EMI Mini-splits and PTAC/PTHP systems
Energy Kinetics Boilers
Evapco Commerical cooling towers
EWC Zone controls and humidifiers
Field Controls HVAC accessories
Filters USA Filter supplier
Florida Heat Pump Water source heat pumps
First Company Specialty products & air handlers
Fresh Air Solutions Commerical energy recovery products
Glasfloss Air filtration products
Goettl Residential HVAC products
Goodman Residential HVAC products
Governair Commerical HVAC products
Grundfos Pumps
Hart & Cooley Registers, grilles, venting products
Heatproof HVAC industry software
Honeywell Thermostats, air cleaners & other accessories
Ice Cap PTAC/PTHP units
ICOR Alternative refrigerants
Infloor Radiant heat products
Iron Fireman Power burners
Islandaire PTAC/PTHP units
Jackson Systems Zoning & other controls
Johnson Commercial controls
Lake Air Air cleaners
Lau Blower components
Lennox Residential HVAC products
Liebert Specialty commercial HVAC
Magicaire HVAC coils & air handlers
Mammoth Commerical HVAC products
Maritime Geothermal Water source heat pumps
Marley Commerical A/C cooling towers
Marlo Coil HVAC coils & air handlers
Microworks HVAC load calc and cost analysis software
Mammoth Commerical HVAC products
McQuay Commerical HVAC products
Monitor Products Home heaters
Nordyne Residential HVAC products
Olsen Residential HVAC products
Payne Residential HVAC prdoucts
Peerless Boilers
Refri-Ozone Commercial HVAC products
RP Research Products, makers of Aprilaire & SpaceGard
Rheem/Ruud Residential HVAC products
Rinnai Home heaters
Robertshaw Controls & zoning products
Robur Residential & light commerical gas A/C
Samsung Mini split & window units
SCI USA Thermostats & other controls
Schwank Radiant heaters
Servtech Software for contractors
Skuttle Home humidifiers
Skymark Specialty HVAC packaged products
Slant/Fin Boilers
Smart Service Software for contractors
Space Pak High velocity duct systems
Suburban Gas fired PTACs, RV heating & cooling equipment
Tadiran Mini-split HVAC units
Tecumseh A/C & refrigeration compressors
Temco Controls A/C & refrigeration controls & valves
Tempstar/Heil Residential HVAC products
Texas Furnace Residential HVAC products
ThermoPride Residential HVAC products
Tower Tech Commercial HVAC cooling towers
Trane Residential & commerical HVAC products
Trion Air filtration products
Trol-a-temp Zone controls
Unico High velocity duct systems
Valtorc Valves & actuators
Viessmann Boilers
Vilter Commercial HVAC & refrigeration products
Van Steenburgh Refrigerant reclaim systems
Waterfurnace Water source heat pumps
Weil-McLain Boilers
White-Rodgers HVAC controls & thermostats
Wirsbo Radiant heat products
York Residential & commerical HVAC products

Contractors Around the Country

CA/Las Vegas AC Pro
Dallas Sala Air Conditioning
Glenview/Chicago Pure Air Heating & Air Conditioning
Houston Dr. Cool & Professor Heat
Houston Vanderford Air
Jacksonville, FL Weather Engineers
LA Air Products Inc.
Little Rock AR area Airmasters
Maryland Gracie Appliance, Heating & Air Conditioning
LA-Riverside All Temp
Mauk, GA Appliance & Air
New Jersey Monsen Engineering
Palm Beach Ewing Air
Philadelphia Veteran Heating & Cooling
Philadelphia R. C. Labbe
Phoenix Precision Air & Heating
Rochester NY Bertram Heating & Cooling
St. Louis Alro Heating & Cooling
Washington State Northwest Energy