Do We Need An Attic Fan

Because what happens is attic fans are so strong that they actually reach down into the conditioned space of your house and they do that by using the wall cavities and where the outlets and pipes come through the walls as places where they draw air from the inside of your house it s that air conditioned air and it ll pull it right up into the attic and exhaust it outside.

Do we need an attic fan.

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. That said air resistance and interference such as vent grates reduces the area of true ventilation. Soffits gable vents without fans and rafter vents are passive ventilation systems to keep your roof and attic healthy. This fan moves 1 000 or more cubic feet of air per minute creating low pressure in your attic.

In other words the entire vent opening doesn t count as vented space. 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 whole house fan and the more. 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 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. Powered attic ventilators or attic fans just as they sound are designed explicitly for placing or installing in the attics. There are really two categories of attic fans. In a properly designed passive system air enters through the soffit.

Often being situated on the roof attic fans are often in need of repairing or replacing following hail storms. 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. Your home s roof and attic was most likely designed with just the right amount of fresh air it needs. If an attic fan is properly installed it will act as an air circulator.

Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. Pulling hot air out of the attic and cool air into the attic. Electric attic fans however often increase energy consumption and cancel out any savings unless the attic is not insulated at all. The ventilation that controls moisture from condensation and regulates the temperature in your attic relies on air circulation.

To reduce that expense some homeowners buy an electric or solar attic ventilator.