Do Attic Exhaust Fans Work

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.

Do attic exhaust fans work.

An attic fan works by drawing in cool air to the attic space that pushes out the hot air through vents. If there are not enough soffit gable or ridge vents a powerful attic exhaust fan can pull the air from your home through the ceiling if it is not perfectly sealed off. 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.

This air is then exhausted through the fan to the outside. Sometime during the sunny days hot air is drawn in from the outside that is further heated up in the attic and this might cause the temperature in your living area to rise. As a certified licensed home inspector it is not correct to say too much ventilation is bad for an attic unless rain moisture is getting in. In such doing the attic fan will reduce the temperature in the attic space that in turn cools down the whole house.

Attic fans are installed at the roof level of your home to regulate the heat level. Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burnersand into the home. As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. 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.

Ideally this will lower the high temperatures that have built up in your attic. 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. Intake vents located at the lowest part of the roof under the eaves allow cool. 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.

The attic fans are fitted with thermostats that will switch on and off the fan depending on the homeowner s preference. Do not use mechanical means electric attic fans. Well what s been found is that if you turn the attic fan on in the summertime that it depressurizes the attic but it doesn t stop there. Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed.