Associations
Air Conditioning Contractors of America
Air-Conditioning & Refrigeration Institute
American Society of Mechanical Engineers
HARDI - Heating, Air conditioning & Refrigeration Distributors International
Plumbing-Heating-Cooling Contractors Association
The National Federation of Independent Business
SMACNA - Sheet Metal and Air Conditioning Contractors' National Association

Manufacturers
Bradford White
Buderus
Noritz
Overntrop
Uponor

On-line Resources
Automated Buildings.com
ACDoctor
ContractorSelling.com
Energy Star
HVAC Forums Online
HVAC /R Jobs - Apply on line
Refrige.com

Publications/Magazines
ACHR News
Contractor Magazine
Design Build
New England HVAC Insider
Pump Zone

Training Resources
AcTecHelp.com
HVAC Training
NATE - North American Technician
Excellence, Inc.
Technical Training Associates