How Your House Attic Fan Works

An attic gable fan is one way to help with the circulation of air in the attic.

How your house attic fan works. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. The fan forces air into your attic purging the hot air out of the attic through the existing vents. Due to positive pressure air in the attic is pushed out through the vents or gables. For homes or buildings with a whole house fan the hot air is pulled into the attic.

A whole house fan is typically installed in the. The whole house fan pulls air in from open windows and exhausts it through the attic and roof. Firstly let s start off with clarifying the difference between a whole house fan and an attic fan. In such doing the attic fan will reduce the temperature in the attic space that in turn cools down the whole house.

An attic fan is installed on the slanted. Intake vents located at the lowest part of the roof under the eaves allow cool. The main work of an attic fan is to regulate the heat level of the attic by removing hot air out of the attic and pushing it outside providing needed ventilation. The attic fans are fitted with thermostats that will switch on and off the fan depending on the homeowner s preference.

There are several different types of attic ventilation systems but most of them feature small vents soffit and gable which draw in cool air along with a primary fan that pushes air outside. A whole house fan is different than an attic fan. As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. Some can have manual switches while others use a thermostat to turn them on and off automatically.

Attic fans work on the principle of pushing out the attic s hot air and replacing it with cool air from outside. Simultaneously negative pressure is created in the living area which helps to draw cooler air in through the windows. Additionally an improperly ventilated attic can lead to a buildup of moisture which can wreak havoc on drywall insulation and even structural components like joists studs and rafters. Do attic fans really work.

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 home. Because heat rises it tends to make attics the hottest part of the house. Attic fans are installed at the roof level of your home to regulate the heat level. Attic fans come with different models.

For example in a 2 000 sq. An attic fan works by drawing in cool air to the attic space that pushes out the hot air through vents.