| 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. |
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