The site identifies which products reviewers like and dislike, where they agree or disagree, and why.

How to buy a room air conditioner.

Consumer reviews, price information, related appliances, buying tips and advice, ratings.

Describes air conditioning from window units up to large industrial applications.

Information and support on heating, ventilation and air conditioning systems or controls for home owners and professionals. Knowledge base, recalls, forum, glossary, and events.

EPA site with homeowner information for consideration when purchasing or repairing a residential system or heat pump.

Includes information on all aspects and variations of cooling, air conditioning, including consumer information on how these appliances work and what to look for.