See also:

• Science: Technology: Mechanical Engineering: Directories  (5)

• All HVAC Info - Directory with forums and links for consulting engineers, contractors, recruiters, associations and organizations, software companies and technical magazines.
• The HVAC Source - HVAC industry links, news, jobs and information.
• HvacZoom - Search engine, directory, and resource for the consumer, commercial, and industrial heating, ventilating, air conditioning, and refrigeration industry.
• Refrigeration Engineers - Portal site with articles, forum, job and company databases.