How Does An Attic Fan Cool Down The Attic

Good insulation reduces fan effectiveness.

How does an attic fan cool down the attic.

The downside of attic ventilation fans. Then prop open the garage s attic access ladder by about 12 inches or enough to let a sizable draft enter your attic. Of course if the attic fan isn t working correctly and is running all year long that would be a significant problem. Attic fans exhaust hot air from your attic to the outside.

The attic fans are fitted with thermostats that will switch on and off the fan depending on the homeowner s preference. An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic. Opening your automatic garage door will let cool air and a draft in. It helps to cool your home temperatures and the attic by approximately 30 degrees.

Powered attic ventilators are the worst way to try to keep your attic cool. As you know cold air settles and hot air rises. These fans are designed to remove excess heat from your attic which in theory is supposed to lessen the load on the air conditioning in your home. In such doing the attic fan will reduce the temperature in the attic space that in turn cools down the whole house.

During the day any cooler air brought in by the fan will be heated up immediately by the surrounding structure. Whole house fans work on the principle of removing the hot and humid air out of the house. Even though an attic exhaust fan can incrementally lower the temperature of a very hot attic using a fan does not stop the source radiant heat. The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.

If the attic fan keeps the house cool enough so that the owners leave the ac off there is almost certainly an energy benefit. An attic fan works by drawing in cool air to the attic space that pushes out the hot air through vents. However the utility of attic ventilation fans is actually quite a controversial topic. Adding an attic fan can improve the airflow in your attic to keep it cool.

To ensure that the attic fan is working properly you need to make sure that your attic is sealed up tight where it touches the ceiling of the top floor. Opening your attic access panel will draw that air into the attic and help to push the hot air up there. How an attic fan works. They ve been well discussed here and other places but briefly they re not cost effective don t deal with the problem where it starts are using convection to solve a radiant heat problem and can even be dangerous by backdrafting combustion appliances and.

Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. Attic fans push out the hot air and pull in the cool air from the vents installed on your roof. Most fans cannot keep up.