Attic Heat Fans

Thanks for some very informative posts by all.

Attic heat fans.

Cheaper fans with plastic components may begin to fail over time under these. The downside of attic ventilation fans. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. There was one large flaw with the fan though while the large fan duct was insulated and it had a damper on the end that exhausted to the attic the heat build up in the attic caused heat to flow back into the house and would noticeably warm the house during the day.

That is a new one on me. Quietcool smart 2830 cfm power gable mount attic fan at amazon this model is our top pick for its ease of use simple installation and maximum energy efficiency best budget. But by adding powered attic fans you will draw more air into the attic. It will help to keep the attic much cooler in the summertime.

An attic fan can reduce the heat in your roof space by between 40 f and 50 f. Lastly i am curious about the recommendation on your blog to reverse the ceiling fans to decrease the radiant heat transmitted from the attic through the ceiling. Solar attic fans work by using sunlight to power the fan s motor to help prevent any heat or moisture build up in your attic. Good insulation reduces fan effectiveness.

This has a knock on effect. During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly. With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly. Using insulation only keeps the attic s heat from traveling through your home.

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. Your attic can reach temperatures of up to 150 ºf which can destroy the integrity of your home as well as completely destroy your roof. The thermostat will usually start at 95 degrees fahrenheit which is the temperature that the attic fan usually starts at. Your attic fan must be built from material sturdy enough to survive the excessive heat that can build up in an attic.

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. However the utility of attic ventilation fans is actually quite a controversial topic. Quietcool attic fans work almost everywhere almost anytime.