- AirConditioning-and-Heating.com
 - Provides information for consumers of HVAC products, including reviews, tips, and tools to compare costs and contractor bids on new systems or repairs. - Bydex.com
- Sourcing database for the HVAC, refrigeration, piping, controls, hydronics, ventilating, and allied industries.
- Chiller Classifieds
- Online HVAC and chiller marketplace with classified ad categories for new, used, and surplus chillers, air conditioners, cooling towers, air handlers, and more.
- Chiller Directory
- HVAC directory with a global reach. Provides HVAC professionals the ability to easily search for companies and service providers and list their companies and services in a comprehensive supplier index.
- Chiller Trader
- Chiller and commercial/industrial HVAC/R marketplace and information exchange.
- Fan Locator Listings
- Directory to dealers, parts and repair centres for industrial and residential ceiling fans.
 Hevacomp
- Database of manufacturers, services, and products for the U.K.- HVAC Expertise
- Offering general HVAC system information and resources for finding a qualified HVAC expert.
- HVAC Mall
- Find manufacturers, distributors, contractors, consultants, HVAC/R software developers, associations, and more.
- HVAC Source, The
- Industry links to vendors, suppliers, organisations, job listings, and other related sites.
- HVAC-CITY
- Specialises in HVAC information for consumers, and provides a search facility to match consumers, builders, commercial building owners.
- HVACware.com
- Designed to help HVAC professionals select and specify boilers, air handlers, heating coils, and hydronic fin tube (baseboard) products.
- HVACweb
- Product showcase for the heating, ventilation, air conditioning, and refrigeration industry.
- Indoorclimate
- Lists contractors and manufacturers.
- Industrial Expertise
- Allows customers to find industrial contractors from around the U.S. Industries include: automotive, power plant, pulp and paper, food processing, pharmaceutical, chemical processing, high tech, and waste removal.
- IQS: Electric Heaters
- Lists manufacturers of various heaters including duct, air, cartridge, immersion, and industrial heaters.
- IQS: Heating Elements
- Covers electric, immersion, tubular, air and cartridge heaters.
- Warmair.com
- Offers heating and air conditioning information and contractor search. Also provides web site design, hosting, and email services for those in the industry.
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