Science says using a fan with your air conditioner can slash energy use by a third—without sacrificing comfort.

Refrigerating and Air-Conditioning Engineers). But 3M and Home Depot have developed their own classification systems called MPR (microparticle performance rating) and FPR (filter performance ...

Some of the results were higher than we expected, so be prepared the next time you take your car in to have the AC serviced. Average estimates for recharging the air conditioners in our sample ...