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Attic Fans - How do they work?

The simplicity is amazing. The pupose is necessary. The outcome is mandatory.

They are designed to replace the moist, hot air that is in your attic with the much less moist and cooler air outside. It sucks the aittc air out through the vent hole that is cut for the fan, and sucks the outside air in through the vents. There are vents that are designed into roofs whether they are in the ridge of your house, the eves, or a gable vent. All can be used with an attic fan.

It is the same basic idea as if you suck air through a drinking straw. You "suck" the air that is in the staw out and "fresh" air is "drawn" in through the other end. The same is true for your attic. The fan "sucks" the air out and the vents draw the new air in. Pretty simple.

I think that it is imperative to have one that is at least temperature controlled. There are some that are also controlled by moisture levels. These are nice, but not necessary. I chose one that is controlled by the temperature, because I was more concerned with heat than moisture. I have it controlled to turn on at 85 degrees.

There are many more energy saving articles in our energy efficiency section. There is more specific information in the links at the beginning of the article.

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Just vacuum and you are done.

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