Building Science Attic Fans

And we didn t make it easy to get into the attic.

Building science attic fans.

Sometimes just a piece of plywood covered a hole hidden in a closet. This american designed fan is designed to reduce attic temperatures and remove destructive moisture thus making your home more comfortable and reducing the load on your hvac system and lowering your electricity bills. In westfield mass who helped write the new code language. Most moisture gets into an attic via air movement not by diffusing through materials we want to keep the living space and the nonhabitable attic space at the same moisture conditions says armin rudd of building science corp.

The remington solar ventilation attic fan is completely the remington solar ventilation attic fan is completely powered by free solar energy. Attic air conditioner and furnace standard vented combustion gas furnace with a single stage air conditioner located in a south texas attic. Using fans to ventilate your attic violates the fundamentals of building science. Even solar attic fans can cause problems.

It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air. Much of that heat then conducts downward and finds its way into the house. Building science fundamentals see all events a building science consulting and full service architecture firm specializing in building technology for all types of buildings including commercial institutional and residential. Unlike a ventilation fan a whole house fan an attic mounted fan that exhausts air from a home at night is designed to cool a house that is to lower the indoor temperature.

Intake vents located at the lowest part of the roof under the eaves allow cool. Attic hatches got their name because they were hatches. Don t let your attic suck power attic ventilators are a bad idea. However as a very old builder 70 years i have known cases where roof mounted attic fans have helped tremendously where the roof is a full hip and the ratio of ridge vents to soffit vents was way out of whack.

Trying to solve the heat gain problem in your attic by using a fan is like lying out at the beach with a fan blowing over you and thinking you re not going to get a sunburn. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Using a fan to blow hot air out of the attic doesn t address the radiant heat flow from the roof to the attic floor.