
Frigidaire FAD504TDD 50-Pint Dehumidifier
Ever experience a summer day that was so humid that it felt like you were walking through a rain cloud? Dehumidifiers keep the house free of unwanted moisture in the air and solve problems such as stickiness and window condensation associated with high relative humidity. They are also frequently used in damp basements or laundry rooms to prevent mold and rot from eating up the furniture, books, and boxes. Dehumidifiers can be expensive to purchase and operate, and must be maintained to prevent other problems from developing, it’s therefore essential that you are properly informed before purchasing one. We’ve put together this guide to teach you everything you need to know to choose the right dehumidifier for you.
Why Get a Dehumidifier?
The first step is to decide if a dehumidifier is necessary for your home at all. Anyone who usually leaves their window open throughout the spring and summer will find that their house accumulates with moisture during the summer months. This moisture gets trapped in when windows are closed up in the fall, which could result in damaging humidity. Similarly, houses without central air conditioning that reaches to the basement, may find dampness in the walls and air that will eventually condense and cause irreparable damage to furniture, books, and storage and will also foster the growth of mold. In both these cases, a dehumidifier may be the perfect solution. Nonetheless, sealing up any internal or external leaks is the first priority.
There are a number of different types of dehumidifiers on the market. Here are some of the pros and cons of each of them:
Heat-pump Dehumidifiers
Heat-pump dehumidifiers are the most common type of unit. They work by chilling the incoming air so that massive condensation occurs. This dries out the air that passes through the system and is eventually returned to the atmosphere of the house. This dehumidified air is slightly warmer than the rest of the air, which also has a drying effect on the rest of the house. The resulting condensation from the dehumidifying process is either collected in a bucket that must be emptied on a regular basis or is automatically drained into a sink, or out of the house.
Heat pump dehumidifiers can be relatively expensive to buy and utilize a substantial amount of electricity to run. They can also be pretty noisy, which isn’t a problem if the unit is placed in the basement. Nonetheless, heat-pump dehumidifiers are the preferred way to go in most circumstances.
Chemical Adsorbent Dehumidifiers
Chemical adsorbent dehumidifiers are designed for hot, humid climates and absorb moisture from the air by using a drying agent. The hot, humid air is then expelled from the house through an exhaust pipe.
Dehumidifying Ventilators
Dehumidifying ventilators work by bringing fresh air from the outside in through a vent. The fresh air is filtered and dehumidified before it is introduced into the house. When only filtration is desired, some units possess dampers that can be set to seal off the fresh air duct and simply re-circulate and filter the indoor air. Many units have a built-in sensor to start the motor when humidity rises above the programmed level. Dehumidifying ventilators use less electricity than a heat pump dehumidifier, but are not effective in hot, muggy weather since they work by bringing fresh air in from the outside but they are good in cold weather. Dehumidifying ventilators can cause depressurization to occur in the basement, causing combustion gas from fuel-fired furnaces and domestic hot water tanks to be sucked back into the house. It’s important to ensure that all of your combustion appliances are properly vented before buying a dehumidifying ventilator and it is also recommended to purchase a CO detector as well. In case of doubt, a professional contractor should be hired.
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