The whole house fan pulls air in from open windows and exhausts it through the attic and roof. It provides good attic ventilation in addition to whole house cooling.
Do you need whole house fan if you have AC?
Essentially, you can use your AC unit and your whole house fan together. However, if the air outdoors is cooler than the air indoors, it doesn't make a whole lot of sense to turn your air conditioning system on.Jun 22, 2015
Is it OK to run HVAC fan continuously?
Keeping your fan on AUTO is the most energy-efficient option. ... If your fan runs continuously, moisture does not have a chance to drip outside. It blows back into your home and your AC works hard to remove extra moisture from the air. You'll need to replace your furnace filter more frequently.
Are whole house fans expensive to run?
A whole house fan averages about $150-$350 and costs about 1-5 cents per hour of use, compared to 17 cents - 20 cents an hour for air conditioning, according to the US Department of Energy[2] .Feb 22, 2015
What does the fan do on central air?
The fan setting on your thermostat controls your HVAC's system blower. The blower helps circulate hot or cold air throughout your home until the temperature on the thermostat is reached.
Does a whole house fan bring in outside air?
When whole house fans are turned on, the fans will pull the cooler outdoor air into your home, through your windows, across your living space, into the attic, and out the attic vents, replacing the hot, stale air. This helps cool the home and attic by up to 30 degrees Fahrenheit or more.
Is it worth getting a whole house fan?
Whole house fans can effectively cool down a house. ... Research conducted in California showed that homeowners who install whole-house fans reduced their dependency on their air conditioning systems by nearly 50%. The only time they were dependent on their air conditioning was on days of extreme heat.Mar 22, 2020
How does a whole house fan cool your house?
A whole house fan works by creating negative pressure. ... As the pressure in the attic builds, it releases by forcing air out the soffits in your eaves or other vents installed in the attic. This creates a cooling effect throughout your home. The rooms where the windows are open will feel it the most.Jul 9, 2019
Is it cheaper to run fans or central air?
Fans are cheaper to run than air conditioners, and can be used in place of air conditioners or along with them to save money. If you have a ceiling fan, run it at the same time as the AC. It pushes cooler air down and over the bodies of the people in the room.Jul 3, 2015
Does running central fan save electricity?
A typical AC fan motor uses about 500 watts when it's running. Therefore, if you run the fan continuously for a 30-day month (720 hours), you would use 360,000 watt hours (720 x 500) or 360 kilowatt hours (kWh). ... Bottom line – If you run the fan in AUTO mode, you'll save about $300 per year.