- Contracting Business Interactive [TheOldNet][Direct] -
Serving the heating, ventilating, air conditioning, and refrigeration industry.
- Heating, Ventilating, Air Conditioning, & Refrigeration Directory [TheOldNet][Direct] -
Resource for the HVAC&R industry listing contractors, distributors, engineers, manufacturers, trade associations, trade publications, and trade utilities.
- HVAC-CITY [TheOldNet][Direct] -
Specializes in HVAC information for consumers, and provides a search facility to match consumers, builders, commercial building owners.
- HVACR Canadian Resources [TheOldNet][Direct] -
A resource for Heating, Ventilation, Air Conditioning and Refrigeration contractors.
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