A Guide to Dehumidifiers for the Home

Understanding the benefits of a domestic dehumidifier

When the humidity in the air inside a house is high, it acts as a barrier for many insects such as moths, cockroaches, and flea’s. 

It can also allow mildew and moulds to grow inside the house, which pose as a major health issue among the people who reside there. For reducing this humidity at home, appliances such as a dehumidifier are the ideal choice. They are also used in industrial climatic chambers for maintaining the humidity levels.

There are two types of dehumidifier: 

  • Desiccant dehumidifiers also known as passive dehumidifiers
  • Mechanical dehumidifiers also known as active dehumidifiers

Desiccant dehumidifiers

Desiccant dehumidifiers use a desiccant material, typically Zeolite, which absorbs water vapour from the air in a similar way to silica gel. A fan draws air into the dehumidifier and passes it through a section of a slowly rotating wheel, which holds desiccant material and dries the air. The moisture is extracted from the desiccant by heating a portion of the wheel not being used to dry the air. This evaporates the water back into vapor, which is then passed over a cold plate to cool the mixture and cause the water to condense. 

Desiccant units will effectively extract moisture from the air in temperatures ranging from one degree centigrade upwards and in real world scenarios are much more effective at extracting moisture than a compressor driven unit - for example a seven liter a day rated desiccant unit tends to extract more moisture than a 30 liter a day rated compressor unit.


Mechanical dehumidifiers

The Mechanical dehumidifier’s are the most commonly used type. They are also very efficient and the design factor includes a simple air conditioner with both cold and hot coils placed in the same box. The mechanism of these types is fan absorbs the room’s air through the AC’s cold coil, which is collected in a bucket, for condensing the moisture. Then, the hot air is passed through the hot coil for heating up to its original temperature.

There are a few things to consider while buying dehumidifiers for home.  The first is the size of the dehumidifier. It is an important factor to consider when buying because the size is determined based on the amount of moisture extracted from the air. The moisture extracted in a 24-hour period is measured in pints. Therefore, the larger the moisture-capturing amount is the larger the size.

There are other points to consider, such as portability. It is best to choose lightweight and compact dehumidifiers, which have a handle and rolling casters for moving it to any place you wish to. This makes it easier to transport your air dehumidifier from room to room with ease. Storage tank capacity is something else to consider, since the larger the tank, the more capacity is has.