Consumersearch.com: Air Conditioners - The site identifies which products reviewers like and dislike, where they agree or disagree, and why. - http://www.consumersearch.com/www/house_and_home/air-conditioner-reviews/
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. - http://superior-air.com/buying_tips.htm
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. - http://www.hvacmechanic.com
Refrigerant-22 Phaseout - EPA site with homeowner information for consideration when purchasing or repairing a residential system or heat pump. - http://www.epa.gov/ozone/title6/phaseout/22phaseout.html
SoYouWannaBuy.com: Air Conditioner - Step-by-step instructions on how to buy an air conditioner. - http://www.soyouwanna.com/site/syws/aircond/aircond.html
HowStuffWorks: Air Conditioners - Describes air conditioning from window units up to large industrial applications. - http://www.howstuffworks.com/ac.htm
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. - http://www.global.carrier.com/
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. - http://www.warmair.com/html/cooling.htm
Epinions: Air Conditioners - Consumer reviews, price information, related appliances, buying tips and advice, ratings. - http://www.epinions.com/hmgd-Large_Appliances-All-Air_Conditioners