Doni Need An Attic Fan

In the late evening or early morning the fan is turned on to exhaust hot air from the house.

Doni need an attic fan.

A fan might be necessary if the construction of your house is such that you. Soffits gable vents without fans and rafter vents are passive ventilation systems to keep your roof and attic healthy. Cooler outdoor air enters through open windows lowering the indoor temperature. 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.

This fan moves 1 000 or more cubic feet of air per minute creating low pressure in your attic. Electric attic fans however often increase energy consumption and cancel out any savings unless the attic is not insulated at all. It doesn t matter if the ventilation openings are spread out as long as there is sufficient space for all the air to escape. A ridge vent is an opening along the ridge of your roof.

Open your windows before you turn on the fan. Studies have shown if your attic is properly ventilated with a ridge vent and your attic is well insulated you wouldn t need an attic fan. Note that these two feet would not need to be one large opening. 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.

To reduce that expense some homeowners buy an electric or solar attic ventilator. Some may also argue that an attic fan helps in the ventilation of your roof and or attic. Your home s roof and attic was most likely designed with just the right amount of fresh air it needs. 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.

As long as you have enough space at the base of the roof for an equal amount of soffit vents you shouldn t need a fan. Powered attic ventilators or attic fans just as they sound are designed explicitly for placing or installing in the attics. For both fans to work well they need large exhaust openings in the roof for the moving air to exit. So if your fan is rated at 1500 cfm you will need about two feet of totally open space in your attic.

That means two feet of open space.