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Dehumidifier Buying Guide

A comprehensive dehumidifier guide that will give you all the information you need on how to buy the right dehumidifier.

Getting Started

A dehumidifier can also be extremely helpful in preventing mold and mildew growth. Put simply, a dehumidifier is just the opposite of a humidifier - where humidifiers add moisture to the air, dehumidifiers remove moisture (humidity) from the air. Some experts even think that drier air can be helpful in dealing with some health issues.

How do I know if I need a dehumidifier?
A sign of excessive humidity in a home can be condensation on the inside of windows, especially if you have double- or triple-pane windows. If condensation is present for prolonged periods, take steps to reduce the level of moisture or increase ventilation in your home. Another sign of excess moisture could be the warping of floors or difficulty in opening wood windows and doors. In such cases, the moisture from the air is absorbed into the wood, causing it to expand.


Small Capacity Dehumidifiers
Rated to remove 25-40 pints of moisture from the air per day. These are used for spaces that are damp and have a musty oder in humid weather or if the room shows signs of moisture on the floor and walls.
Medium Capacity Dehumidifiers
Rated to remove 45-60 pints of moisture from the air per day. These are used for spaces that feel and smell wet, the walls and floors sweat, or seepage is present.
Large Capacity Dehumidifiers
Rated to remove up to 65-70 pints per day. These are used for large rooms or extremely wet spaces.


Air filter
Air filter is an option accessory that helps clean the air that is being drawn into the dehumidifier. Air will be pulled into the unit, pass through an air filter, collect the moisture and exhaust clean, dry air.
Auto-Restart is a helpful function that is useful during power outages. If a dehumidifier loses power, the unit will automatically turn the model back to the previous power settings.
Caster wheels
Caster wheels are typical on most dehumidifiers, caster wheels allow for easy transportation and portability.
Collection Tank or Collection Bucket
Most home or residential dehumidifier models have an internal collection tank or bucket that can be removed when needed. Once a dehumidifier model extracts enough moisture to fill the collection tank, the tank most be emptied. Most models have an auto-shut off feature that turns the dehumidifier off once the tank is full.
Direct drain-off
A direct drain-off eliminates the hassle of emptying a bucket. An anti-frost sensor can be very important, as the unit will shut off as frost starts to build on the compressor.
Humidistat measures the humidity in the surrounding area; it will relay that information to the dehumidifier and adjust accordingly. Having a humidistat is always a great option, since it allows you to set the humidity level that you desire.
Pint Capacity is the amount of moisture in pints that a dehumidifier can eliminate from the area within 24 hours. Models with less than 70 pints are used for the home, and anything greater than 70 pints would be used for larger, commercial areas.

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