How do attic fans work

The recent hail storm and replacement of everything that is roof-related has many of us having to deal with attic fans and wondering what it is exactly that these fans do. Often being situated on the roof, attic fans are often in need of repairing or replacing following hail storms. There are really two categories . The whole house fan pulls air in from open windows and exhausts it through the attic and roof.

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

The authors of the paper you mention discovered many instances of attic ventilators causing depressurization of the attic.

Although they do not address the root cause, it would seem that either the ventilators are oversized or the intakes are undersized.

Whatever the cause, a depressurized attic could cause air to flow from . An attic fan can be gable mounted or roof mounted. Additional vents are required to draw in . Powered attic fans are frequently said to be the solution to all sorts of things: mold in the attic, ice dams, humidity, an air conditioning not working well. For both fans to work properly, they need to easily exhaust the air to the outdoors.

DEAR TIMy attic space gets as hot as blue blazes. Do these fans really work , and are they hard to install ? Will the fan significantly reduce the temperature inside my attic? The laws of thermodynamics will disagree with you.

The problem is the temperature differential is not very high due to all the insulation your benefit is marginal at best.

Have you ever asked yourself: do solar attic fans really work ? I bought two of them from RemingtonSolar. You would use one anytime it is cooler outside to cool and v. 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. This will use more energy and make your air conditioner work harder, which will increase your summer utility bill.

Unless your roofing system has insulation on the roofing deck and is designed without ventilation, your furnace should not be heating your attic. Learn how solar attic fans work and the pros and cons of cooling your attic with solar power. Cleaning the fan shutters that open to release hot air out of your home, and washing the fan blades, helps ensure that the fan works properly.

These only need to be cleaned every few years to remove unwanted dust and grime.