How long does it take a whole house fan to cool a house?
How long does it take a whole house fan to cool a house?
A 2000 square foot home with 8 foot (2.4 m) high ceilings will, in theory, have all the air in the house completely changed in 8 minutes with a 2000 CFM fan (and windows open in each room). Likewise, a 4000 CFM fan will do it in as little as 4 minutes! Here's how one arrives at those figures.
Can you run a whole house fan with the AC on?
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. ... Using a whole house fan reduces the need for air conditioning.22 jun 2015
How long should you leave a whole house fan on?
For best results, run your whole house fan for at least 10 minutes first thing in the morning to bring a cool breeze through the house and into the attic. This will expel any hot stale air buildup from the night before.
Is it expensive to run a whole house fan?
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] .22 feb 2015
Can a whole house fan overheat?
Open doors and windows, otherwise the fan can lead your furnace, water heater or gas-burning appliances to backdraft exhaust carbon monoxide and exhaust fumes into your home. It can also lead to your fan overheating. ... Because of the air pressure change caused by the whole house fan, the fire will not vent correctly.26 oct 2015
How do I cool my house with a whole house fan?
- 1 Open a few windows 4-6 inches.
- 2 Turn on your whole house fan using the switch or portable remote and timer.
- 3 Feel the nice, cool breeze as air passes through to the attic and fresh air replaces stale, trapped air.
- 4 Experience complete indoor air exchanges in your home every 3-4 minutes.
How much power does a whole house fan use?
A whole house fan will draw 200 to 700 watts, about 10 percent of a central unit, which will draw 2,000 to 5,000 watts. This means running the whole house fan will cost approximately 90 percent less than running a central air conditioning unit for the same amount of time.31 may 2017
Can you run a whole house fan all night?
Getting the most from your AirScape Only use your fan when the outdoor air is cooler than your indoor air. Make sure your A/C is off when you run the fan to avoid wasting energy. We recommend running the whole house fan all night. The goal is to cool your entire house down, not just the air.
How long should you run the whole house fan?
For best results, run your whole house fan for at least 10 minutes first thing in the morning to bring a cool breeze through the house and into the attic. This will expel any hot stale air buildup from the night before. Then, close windows, doors and the blinds on the sunny side of your home.
When should I turn off my whole house fan?
Turn on the whole-house fan when the air outdoors is cool and dry, particularly during the evening hours when temperatures have cooled. Turn off the fan during the day when temperatures outside rise higher than in the house.
Why are whole house fans bad?
While a whole house fan is known for saving money on the cooling bill, it can possibly lead to a higher heating bill in the winter, especially for older whole house fans. An older house fan is a perfect escape for the air you are paying to heat in the wintertime.
Is a whole house fan beneficial?
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.22 mar 2020