How Your House Attic Fan Works

It provides good attic ventilation in addition to whole house cooling.

How your house attic fan works.

The whole house fan pulls air in from open windows and exhausts it through the attic and roof. An attic fan works by drawing in cool air to the attic space that pushes out the hot air through vents. They can help you save a lot of money on your energy bills as you may not have to use air conditioning if the weather isn t too hot. Attic fans come with different models.

Some can have manual switches while others use a thermostat to turn them on and off automatically. Attic fans are installed at the roof level of your home to regulate the heat level. 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. During the day any cooler air brought in by the fan will be heated up immediately by the surrounding structure.

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. Due to positive pressure air in the attic is pushed out through the vents or gables. The attic fans are fitted with thermostats that will switch on and off the fan depending on the homeowner s preference. How does an attic fan work.

Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic. 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.

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. How an attic fan works attic fans exhaust hot air from your attic to the outside. 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. This air is then exhausted through the fan to the outside.

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. 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. In such doing the attic fan will reduce the temperature in the attic space that in turn cools down the whole house. Simultaneously negative pressure is created in the living area which helps to draw cooler air in through the windows.