How Long Has This Form Of Home Cooling Been Used?

Before there was air conditioning, people used fans to cool their homes. Whole house fans have been used in the United States for a very long time. Within the last 15 years, fan designs and efficiencies have changed dramatically for the better.

Will Your Whole House Fans Affect The Blown-In Insulation In My Attic?

By virtue of design, our fans will have a minimal impact on attic insulation.

When Should I Use My Fan?

Typically the evening and early morning hours. Anytime the outdoor temperature is cooler than inside your home.

When is the Best Time to Run a Whole House Fan?

by George Karonis June 23, 2025

A whole house fan can cool your home, improve the air circulation, and reduce your utility bills. However, they must be used in certain climates and time of day to get the maximum benefits.

How does a whole house fan work?
Whole house fans bring in fresh outside air while expelling the stale, warm indoor air, offering eco-friendly cooling solutions for your home.

When is the best time to run a whole house fan?
While a whole house fan can be run at any time of the day, you can vary the timings depending on the time of the year and your goals.

Summer months:
Whole house fans can effectively cool your house in the summer if the outside temperature is cooler than your home’s indoor temperature. To get effective cooling, run the fan during the early morning and after sundown.

Whole house fans can be turned on for about 10 minutes early in the morning to dispel the stale indoor air and bring in the fresh outdoor air through the open doors and windows. The fans can also be run during evening time, preferably all night long, on a timer, and then switched off in the morning for effective temperature control at home.

Avoid running whole house fans during the day, especially in the hot summer months and in humid climates, as they offer no cooling benefits to your home. The fan in such cases will simply bring in the hot and humid air from outside, causing no significant temperature difference indoors.

Winter months:
Whole house fans can also be used in mild winter climates to bring in the fresh, clean outdoor air while expelling stale indoor air, improving your home ventilation. Running whole house fans in the winter can also reduce trapped air pollutants, improving the air quality while reducing the moisture buildup in the attic. To ensure the whole house fan is working effectively, make sure to keep your windows and doors open. Whole house fans work by expelling warm indoor air through the vents while bringing in cool, fresh air through the open windows and doors. Keeping the windows and doors open while running the whole house fan can effectively reduce your home temperature.

Shop our collection of whole house fans today. Contact us here at WholeHouseFan.com at 1-661-775-5979.

When is the Best Time to Run a Whole House Fan?

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