A dehumidifier as an electrical appliance designed to remove humidity from the air. It does this with the process of condensation. There is a small fan in the dehumidifier that pulls air in over a coil filled with refrigerant, the water in the air condenses on the coil and drips into a container. After this, the air is passed over a warmer coil and reheated.

Why dehumidifiers are necessary

Moisture in the air can be a problem due to the fact that some people find that it makes for an uncomfortable environment. Apart from this, it can cause mold which is unsightly and to which some people may be allergic. Humidity can worsen health problems like asthma. Mold can also damage furniture, books, and other valuable goods that may be stored in the home. The rooms in a house that are often most strongly affected by moisture in the air are the basement and the bathroom, though this can vary depending on the house and the location.

Checking humidity

In many cases this can be done by sight. Moisture on the walls or splotches of mold are reliable indicators that the air in a room is too moist. In some cases where it may not be so obvious it may be necessary to obtain a device for measuring humidity called a hygrometer. The ideal humidity for a home should be between 30% and 50%.

Choosing the right features in a dehumidifier

The method of rating a dehumidifier is to assess how much water it can pull from a certain square-footage in 24 hours. There are dehumidifiers that can pull gallons from a whole house thus reducing the humidity, whereas others would need a smaller space like a closet in order to have any effect. The range of capacities and sizes is great. It is better to have a dehumidifier with too much capacity for a given space that one without enough. Another factor that affects which dehumidifier is the right choice is environmental temperature. How cold is the space in which the device will be working? If it is typically colder than 65 degrees it may be necessary to purchase a dehumidifier rated to work in at low temperatures. If a regular dehumidifier is used in a cold weather setting the refrigeration coils can ice up, damaging or destroying it. A cold temperature dehumidifier will shut off the cooling coils at the first sign of icing up and the warm coils will be used to defrost.

Portability and noise

It is possible to attach a dehumidifiers for home permanently to the HVAC system in a house, or it may be more desirable to get one that can be moved from room to room. It depends on what the home-owner's budget can stand. As for the noise factor, these appliances should always be turned on in the store so that they can be heard prior to purchase.

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