How Does a Dehumidifier Work

A dehumidifier has many benefits, but have you ever asked yourself: how does a dehumidifier work? A dehumidifier can create comfortable air in humid or damp conditions. A dehumidifier can also reduce the formation of mold, mildew and dust mites. Dehumidifiers can even help protect your home and belongings from moisture damage.

Just How Does A Dehumidifier Work?
Have you ever sat down to a tall, cold glass of iced tea on a warm summers day? As you sat and watched the world pass by, you may have noticed that your glass became covered with water. If you were particularly lazy, you may even have noticed a pool of water forming around the base of your glass. That glass of iced tea was acting as a miniature dehumidifier.

Much the way moisture will form on the outside of a cold glass, a dehumidifier works by passing air over a refrigerated metal coil. As the humid air contacts the metal, moisture condenses out of the air and collects on the coil. When enough moisture has collected, it runs down into an empty reservoir for later removal. The air, meanwhile, is warmed back to room temperature by a heated coil and blown back into the room by a fan.

If you have an air conditioner, it performs the same function as a dehumidifier-removing moisture and allowing it to drain outside the home.

The Perfect Dehumidifier

If you're in the market for a dehumidifier, here are some features to look for:

  • Let it drain. A dehumidifier with a drain system will keep you from having to worry about emptying a full reservoir. You'll need a floor level drain or an optional pump system to move the water outside. These can be an extra expense, but you'll never have to worry about ruining your carpet or flooring with an overflowing reservoir.
  • Is it full yet? Look for a visual indicator to let you know the level of your dehumidifier's water reservoir. Better yet, an automatic shutoff will stop the device when it's reached its limit.
  • Keep it under control. A dehumidifier with a humidity meter will control the humidity at the proper level and keep your home from becoming too dry.
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