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Wall Air Conditioners

Heating and HVAC
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Wall air conditioners offer the same benefits as room air conditioners and don't require that you have a conveniently-placed window in which to install a unit. Wall air conditioners are less expensive than central air conditioning units, provide cooling capabilities of up to 18,000 BTU/hour, and can cool a room as large as 1,000 square feet. Some wall air conditioners are even large enough to cool an entire small house, provided that properly-placed, portable fans and appropriate insulation are used.

How Does It Work?

A wall-mounted air conditioner works in the same way as window air conditioners. Two fans blow air over hot and cold Freon-filled coils. The hot coils condense the Freon into a liquid, which then runs through an expansion valve and evaporates, which creates cold Freon gas. The cold gas absorbs warm outside air, cooling it and blowing it into the room to lower the roomís temperature. As a by-product of this process, the air conditioner also removes excess humidity from the room, making it feel even cooler and more comfortable.

Benefits of Wall Air Conditioners

A wall-mounted air conditioner preserves your window view and allows you to open the window when it's cool enough outside that air conditioning is unnecessary. Also, because wall air conditioners stay in place year-round, they offer easy, one-time installation.

Finally, because it never leaves the wall, thereís no need to store a bulky AC unit in another location such as your attic or basement during the off-season. This makes a wall-mounted AC a particularly good option in regions that experience all four seasons.

Where to Install Wall Air Conditioners

Wall air conditioners provide more installation options than window units. Place a wall-mounted AC unit on any outside-facing, sheetrock wall that does not have any existing pipes or electrical lines running through it. With the help of a qualified electrician, itís even possible to move electrical lines to accommodate an AC unit if necessary.

Because the installer will have to cut a hole in the wall, a wall air conditioner cannot be mounted on a stone, brick, or concrete wall.

Also remember to mount the unit near an electrical socket, as it has to plug into either a 115-volt or 230-volt household circuit, depending on the air conditioner size. A larger air conditioner requires its own circuit, while a smaller unit may share a circuit with smaller appliances (but not major appliances such as refrigerators and dishwashers).

Unplug the AC when not in use in order to keep it from drawing electricity and raising your power bill. For the most energy-efficient cooling and cost effective air conditioning, look for wall air conditioners with an Energy Star rating.

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