How Your House Attic Fan Works

Intake vents located at the lowest part of the roof under.

How your house attic fan works. 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. In such doing the attic fan will reduce the temperature in the attic space that in turn cools down the whole house. It provides good attic ventilation in addition to whole house cooling. Most fans cannot keep up.

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. 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. Due to positive pressure air in the attic is pushed out through the vents or gables. An attic fan works by drawing in cool air to the attic space that pushes out the hot air through vents.

This air is then exhausted through the fan to the outside. Attic fans come with different models. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Simultaneously negative pressure is created in the living area which helps to draw cooler air in through the windows.

As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. 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. 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. How does an attic fan work.

Some can have manual switches while others use a thermostat to turn them on and off automatically. The attic fans are fitted with thermostats that will switch on and off the fan depending on the homeowner s preference. For homes or buildings with a whole house fan the hot air is pulled into the attic. Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic.

During the day any cooler air brought in by the fan will be heated up immediately by the surrounding structure. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner. How an attic fan works attic fans exhaust hot air from your attic to the outside. Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside.