Whole-house fans can be an effective way to supplement or even replace air conditioning, especially during times when significant cooling occurs at night. Find out how a whole-house fan can help save energy and money while helping to cool off your home.

How Do These Systems Work?

The technology that allows a whole-house fan to cool your home dates back centuries. In the Mount Vernon home of George Washington, open windows in the cupola at the top of the home would draw cool, fresh air through windows in the lower part of the house. That would create air circulation, forcing stale hot air up and out through the cupola windows.

This process is accelerated mechanically with a whole-house fan, usually installed in the ceiling between the top floor and the attic. The fan pulls warm interior air upward, venting it out through attic vents. Cooler outside air replaces the warmer air through windows in the home’s living spaces.

When Are They Effective?

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The best time is when it’s warm during the day and cooler at night. Open the windows at dusk and turn on the fan to start the process of replacing warm indoor air with cooler outside air. These systems work best in multi-level homes in areas where it does cool off at night for several months a year.

Instead of having the fan installed in the ceiling under the attic, some of these systems use ducted fans installed in the attic. Stale air is exhausted through ducted vents rather than attic vents or windows.

If anyone in your home suffers from allergies, whole-house fans can be counter-productive since they rely on drawing outside air into the home, along with whatever allergens are hitching a ride.

Learn more about whether a whole-house fan would work for your McKinney or Frisco area home, as well as Bill Joplin’s Air Conditioning & Heating’s ventilation solutions, or give us a call at 818-414-4655 to schedule an appointment!