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Re-activateBigger isn't always better, and that adage holds true for air conditioners. If you install a unit that's too large—in terms of British Thermal Units—for the room where you've placed it, the compressor will likely turn off before the air conditioner has lowered the humidity level in the space. Instead of a comfortable room, you'll end up with a space that's cool but feels unpleasantly damp.
A number of other factors play a role in determining how big an air conditioner you should buy, including the climate in your area, the size of the room, and the number of windows in the space. So once you've read "Quiet comfort," our latest report on and review of air conditioners, and referred to our exclusive sizing worksheet to determine the amount of cooling power you need, use the Ratings (available to subscribers) to find the right model.
Once you've installed your new air conditioner, read "Cool runnings" for tips on keeping your air conditioner working smoothly and lowering your electricity bill. For expert advice on how to cut down on how much A/C you use, see "How to keep your cool."
Essential information: Dehumidifiers can also enhance the comfort of your home during the damp days of summer. Read our buying advice to find out what to look for when you're shopping.
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