Attic Fan Air Flow Direction

Attic fan ventilation 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.

Attic fan air flow direction.

That pulls cold air up to the ceiling and more evenly distributes the warmth the. This pulls cool air up toward the ceiling which in turn displaces the warm air that rises and collects near the ceiling. Again terminology gable vents are vents that are installed on the ends of the roof rise and ridge vents are installed at the peak of the roof. 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 attic.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Intake vents located at the lowest part of the roof under the eaves allow cool. You place the fans on the gable walls of your attic. Powered attic ventilator fansdesigned to cool your attic by drawing the hot and humid air out of the attic and bring in a flow of chilly air from outside.

After entering the soffit air needs to flow upward and exit through gable vents or ridge vents cooling the roof structure and roof covering to outdoor temperature. Whole house fans are used to blow hot air out of the attic by sucking cool air through the house up though the whole house fan and out though the gable vents in the attic. A fan set to move clockwise opposite the ceiling fan direction in summer and run on low speed creates an updraft. Some whole house fans however can be reversed to spin in the opposite direction.

A ceiling fan that spins clockwise will draw cooler air up and force warmer air near the ceiling down and out toward walls. Ceiling fan direction in the winter should be clockwise and the fan should run at the lowest speed.