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The idea behind a dehumidifier is to remove moisture from the air and leave you with a drier environment than you had before. Dehumidifiers work by creating condensation and trapping the water so it is no longer in the air. A dehumidifier collects moist, warm air and cools it; the cooling causes the moisture to condense into a collectible form and dry air is expelled back into the room. Air and water filters go hand in hand with dehumidifiers; if you like to be in control of your environment, shop and get started at prices you can't afford to ignore.
Dehumidifiers are commonly used in damp climates and areas like basements that tend to be moist. If you spend a lot of time in your basement or store valuable or delicate items downstairs, a dehumidifier can make the experience more comfortable and help prevent moisture damage to family photos and other treasures.
Because dehumidifiers collect moisture, there will be excess water in the collection unit that you will need to empty regularly. A portable dehumidifier will likely come with a hose or tube that drains the water away from the unit; you can position this hose to drain into a bucket (which you'll have to empty regularly), out a window or directly into a drain. Attaching the hose directly to a sewer pipe means the location of your portable dehumidifier is more permanent, but it removes the pressure of remembering to remove the excess water. Dome dehumidifiers feature an auto-off feature to prevent overflow and spills from collected water; look for this feature if you think you may forget to empty the collection bucket.
Dehumidifiers generally list their output capacity in pints; this is a more telling measurement than coverage area. Average output capacity refers to the number of pints of condensation removed per 24-hour period, assuming continuous use. Coverage area can be misleading because a 15-pint dehumidifier might be ineffective even in a small area if the humidity level is especially high.
When setting up your dehumidifier, choose a location that is free from or low on dust and other airborne debris. Dirt and dust can collect on the inner coils of a dehumidifier and impede its effectiveness. Avoid placing the dehumidifier in direct contact with walls or furniture; free-flowing air circulation is important for the dehumidifier to perform at peak capacity.

Recent Customer Reviews in Dehumidifiers

  • Aug 25, 2014

    budgetdecorating1998  from San Francisco, Rating:5.0

    This dehumidifier was a great purchase, especially given that it was a refurb. It ended up being a great value. I've had it for about a year now with no issues, and it was an excellent little workhorse in our windowless, damp bathroom. Thanks, Overstock!

  • Efficient and quiet

    Sep 3, 2014

    crabtreej  from Colorado, Rating:5.0

    I have a room that by nature was 57% humidity and small white mold was forming everywhere. I installed the Dehumidifier and used the hose drain option to the floor drain. Four days later the problem was solved! It’s been running now for three weeks and it feels dry in the room. Since it’s hooked up to the drain it’s self-sufficient and requires nothing to operate. The temp/humidity thermostat reads “too low humidity to report”. YES!!

  • Haier Dehumidifier

    Dec 9, 2013

    goldenhome  from Phila PA, Rating:2.0

    this machine is noisier than our oil-fired furnace in the basement. this was a bad lead by consumer reports.

  • Worked for a while and broke

    Jul 23, 2013

    paigeeli09  from minnesota, Rating:3.0

    This was a great Dehumidifier when we first got it! After about a week the light never came on to show when it was full so it overflowed and went all over the floor with out us knowing:( What a mess. Other than that we really liked it.

  • Really, really, really terrible.

    Jan 28, 2015

    Zachary B. Rating:1.0

    No idea how this machine could muster several great ratings, as it is a totally useless device. I put it in a single small, very moist and mildew-y room and it collected very little water. The mildew has since taken over the house and is holding my cat for ransom. The dehumidifier just sat there, whirring, mocking me and my family as the mildew taunted us: "I'M NEVER GOING TO LEAVE"

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