Centrifugal Extractor Fan

Geothermal Cooling System

Evaporative Air Cooler

Germ-Free Humidifier Systems

Electric Window Fans

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Floor Fans

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Air Admittance Valve

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Electric Window Fans

While in-window air conditioners include a fan-only setting that is useful for nighttime and when you want to save energy, electric window fans provide no air conditioning, only air circulation and ventilation. Electric window fans are produced by manufacturers such as Honeywell, Holmes, Lasko, Rival, Sunbeam, Bionaire and Air King. Very simple in design and suitable for use in any openable window, electric window fans plug right into a wall outlet and effectively draw warm air out of a room, helping to lower the temperature on hot days.

Electric Window Fan Applications

Electric window fans are the ideal appliance for rooms without air conditioners. On hot days, the fan draws warm, stuffy air out of a room, expelling it outside. The fan can also be reversed to draw in cooler air to the room after the outside temperature has dropped.

Electric window fans are typically quite portable, either square or rectangular in shape and sit easily in an opened window. They are usually held in place between the sill and the opened sash on a double hung window.


Very affordable and energy efficient, electric window fans usually have multiple speeds and often feature dual rotors for increased air circulation.

Determining the Best CRF Size for a Window Evaporative Cooler

A window evaporative cooler is a good alternative to air conditioning in areas that have low humidity. They use less energy than air conditioners and can provide relief on hot days without raising the amount spent on utilities. While air conditioners use BTU's in their rating, evaporative coolers use a different method for rating.

Measure the Room

If you end up with a small window unit for a large room, don't expect much cooling benefit. A unit that is overpowering will only serve to increase your monthly utility bill. You will want to measure the room accurately in order to get the best cooler. You need to find the total space of the room, including the height of the ceiling.


To find the cubic feet per minute (CFM) required of your evaporative cooler, you will want to take the cubic square footage of the area and divide by half. To find the cubic feet of the room, you will take the square footage and multiply that by the height of the ceiling. For example, a 500 square foot room with 8 foot ceilings would have a cubic footage of 4,000 square feet. For this room 2,000 CFMs would be needed.