Industry Links
- ACCA (Air Conditioning Contractors of America)
- AHRI (Air Conditioning, Heating, and Refrigeration Institute)
- Air Conditioning, Heating, Refrigeration News
- ASHRAE (American Society of Heating, Refrigeration and Air Conditioning Engineers)
- Contractor Magazine
- Conversions and Equivalent Measures Calculators
- CSA Standards
- CSA Certified Product Listings
- DOE Appliance and Commerial Equipment Standards
- Energy Star
- ETL (Intertek)
- EPA (United States Environmental Protection Agency)
- HRAI (The Heating, Refrigeration and Air Conditioning Institute of Canada)
- HVAC Insider
- RSES (The HVACR Training Authority)
- SMACNA (Sheet Metal and Air Conditioning Contractors' National Association)
- Supply House Times
- UL Certification Directory