How Your Hous Attic Fan Works

How an attic fan works.

How your hous attic fan works.

Good insulation reduces fan effectiveness. It provides good attic ventilation in addition to whole house cooling. Attic fans exhaust hot air from your attic to the outside. The whole house fan pulls air in from open windows and exhausts it through the attic and roof.

Because whole house fans were cheaper than air conditioners and worked well they began being used in the 1950s primarily in the south. However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the. It helps to cool your home temperatures and the attic by approximately 30 degrees. For homes or buildings with a whole house fan the hot air is pulled into the attic.

However the utility of attic ventilation fans is actually quite a controversial topic. An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic. Whole house fans work on the principle of removing the hot and humid air out of the house. Many people confuse a whole house fan with an attic fan but the two accomplish different goals.

Whole house fans should provide houses with 3 to 6 air changes per hour varies with climate floor plan etc check with a professional to determine what is appropriate for your. 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 are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside. The whole house fan is installed inside the attic between the living space and ceiling.