ACDoctor.com: Brand Neutral Air Conditioning Information: Information on buying and maintaining air conditioning systems.
Carrier: Brand name product site. In addition to Carrier information, also has pages with consumer information such as what size air conditioners to buy for both home and industrial use.
Consumersearch.com: Air Conditioners: The site identifies which products reviewers like and dislike, where they agree or disagree, and why.
eBuyingGuides: Window Air Conditioning: How to buy a room air conditioner.
Epinions: Air Conditioners: Consumer reviews, price information, related appliances, buying tips and advice, ratings.
Heating and Air Conditioning Buying Tips: From a sales site, consumer information on buying heating and air conditioning and on hiring a contractor for installation.
HowStuffWorks: Air Conditioners: Describes air conditioning from window units up to large industrial applications.
HVAC Mechanic.com: Information and support on heating, ventilation and air conditioning systems or controls for home owners and professionals. Knowledge base, recalls, forum, glossary, and events.
Refrigerant-22 Phaseout: EPA site with homeowner information for consideration when purchasing or repairing a residential system or heat pump.
SoYouWannaBuy.com: Air Conditioner: Step-by-step instructions on how to buy an air conditioner.
Warmair.com: Cooling Topics and Tools: Extensive information on all aspects and variations of cooling, air conditioning, including consumer information on how these appliances work and what to look for.