Types of Dehumidifiers

Different technologies, models for home use

There are several different ways of grouping dehumidifiers and you will need to consider each of these groupings as you consider the purchase of a dehumidifier.

Four common types of dehumidifiers are heat pumps, ventilating dehumidifiers, chemical absorbent dehumidifiers and even homemade dehumidifiers. The four types are all made to do the same thing: take unhealthy relative humidity out of the air to protect you from illness and protect your home from mold and rot (among many other things). Read about these kinds below.

Dehumidifiers can also be grouped by scope. There are basement, portable and whole home dehumidifiers.

Portable Dehumidifiers– Sometimes you need more dehumidification in one part of your home (or apartment) than others. Be sure to avoid heavy units that can weigh in excess of 100 pounds, especially if you have stairs. Also, purchase one with a long outlet cord to reach every area. A unit with a humidistat can help you gauge relative humidity in each room. Alternately, you can use a handheld hygrometer to test yourself.

Whole Home Dehumidifiers – These dehumidifier units are worth the homework. The good ones generally cost a pretty penny, need to be maintained properly. You really do need the right system for your home in terms of size and functionality. Whole home dehumidifiers can protect your artwork and furniture as well as the home’s structure itself from mold and mildew, rust and cracking and warping. High-capacity dehumidifiers can remove 100 pints of water a day; a high-efficiency unit will keep your pocketbook in check. Make sure you check out the benefits of these all-in-one systems before spending.

Basement Dehumidifiers – For the area of the home that is most susceptible to mold and high humidity. Most basement dehumidifiers are simply portable dehumidifiers but there are some units designed specially for basement conditions. Before considering a dehumidifier for your basement, take care of existing issues like cracked walls and floors, mold, window condensation, etc. If you are going to purchase a basement dehumidifier you might want to get one that has a direct drain-off hose, so that you are not constantly running up and down the stairs to make sure the water tank isn’t full.

Four Types of Dehumidifiers

There are basically four types of dehumidifiers: heat pumps, chemically absorbent dehumidifiers, homemade dehumidifiers and dehumidifying ventilators. Ensure you check the efficiency rating or efficiency factor. This measures the amount of water the dehumidifier can eliminate at 27 degrees Celsius and 60 percent relative humidity per kilowatt hour. Most dehumidifiers range from 15 pints to 60 pints

Heat Pump Dehumidifiers work through the use of a heat pump, fan and heat exchange coil to get rid of moisture. Basically, a heat pump takes in indoor air via the fan, through the heat exchange coil. The coil is at near-freezing temperature. The moisture condenses and another heat coil reheats the air and it exhausts it back into the room; this continues cyclically. Heat pump dehumidifiers can cost anywhere from $150 to $400 on average, but some upscale models can cost more than $1500.

Dehumidifying Ventilators are perfect for basements, crawlspaces or attics. Dehumidifying ventilators use an exhaust fan and a sensor set to a particular humidity level.

Chemical Absorbent Dehumidifiers are made of silica gel, a desiccant-type adsorbent. In this method, gel is heated and placed on a wheel; a separate loop dries the gel and exhausts the damp air through a vent outside. This type of dehumidifier is best suited to very hot and humid conditions. In terms of use, these are reminiscent of the little packets of ‘stuff’ that come with shoes when you first buy them.

Homemade Dehumidifiers work by using bags of de-icing salt to absorb moisture out of the air. The salt then drips into a bucket below. You must replace the salt regularly.

Dehumidifiers work best when you close all of the windows and doors to ensure that space is tighter. In this way, the dehumidifier will respond more effectively. If you are only letting in more humid air, this is wasteful. Ensure there is nothing obstructing the rear or front grills and coils – leave at least 12 inches of space around the entire unit.

Advertiser Links for Portable Dehumidifiers