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Dehumidifier FAQs




What size dehumidifier do I need?

The capacity that you need depends on several factors, the most important of which are the area that needs to be dehumidified and the humidity level in that area. Please view the following chart to approximate the capacity of the dehumidifier that you need:

Which Dehumidifier is Right for You?
30 to 40 Pint Dehumidifiers 41 to 59 Pint Dehumidifiers Dehumidifiers 60 Pints & Up

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What does a dehumidifier's capacity mean?

Dehumidifiers are rated by the maximum amount of humidity that they will remove from the air in a 24 hour period. For example, a 40 pint dehumidifier is rated to remove 40 pints of moisture from the air in a 24 hour period. Keep in mind that even though the dehumidifier may be removing 40 pints of moisture a day the unit may only have a 25 pint storage tank so you will need to manually empty the reservoir bucket in order to achieve the unit's maximum capacity. To avoid this issue you would need to purchase a unit that offers a direct drain option so the unit may continuously expel the moisture into a nearby drain in your area negating the need to manually empty the holding tank.

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Which model would minimize operating costs?

Start by selecting a unit that is “Energy Star” rated. The Energy Star rating is an international designation indicating that an appliance has been deemed energy efficient. The dehumidifiers that offer this designation are clearly marked on our website. You will also need to make certain that you do not select a dehumidifier that is too small for the area you wish to cover and the humidity level that you wish to maintain. An undersized dehumidifier will run more often which will in turn use more energy than a properly sized unit.

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Would a dehumidifier add some heat into the area in which it is located?

Yes, a dehumidifier will add some heat into its immediate environment. The amount of heat will vary greatly depending on the size of the unit and the area it is operating within. The warmer the temperature the unit is operating within the more efficiently the unit will be able to remove moisture from the air. It is conceivable in smaller areas that a dehumidifier may raise the ambient temperature 5 to 8 degrees. Conversely, a dehumidifier will cease to operate if the environment becomes too cold. This is an important factor to consider if you are attempting to dehumidify a basement area that is not heated. Check the specifications of the unit you are considering for more information on the units operating parameters.

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For larger spaces would I be better off with a “whole house” unit or a couple of smaller models?

While there are many models that claim to dehumidify large areas their true effectiveness is dictated by the airflow within the operating environment. If air is unable to easily flow from one room to another it will greatly reduce the effectiveness of a whole house unit. In these situations you may need to employ a ceiling fan or smaller portable fans to increase the airflow between the rooms and to the dehumidifier. Another option would be to purchase two smaller units and place them at opposite ends of the home.

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Are dehumidifiers noisy?

Although noise is a very subjective topic, the average dehumidifier is typically not as loud as a window or portable air conditioning unit. However, a dehumidifier will make some noise during operation so you may want to plan on locating the unit in a part of your home other than the bedroom or any room where you require low levels of sound. As a frame of reference, the average home dehumidifier is rated around 55-60 dB, or about the same as human speech.

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