Attic fan

Old 04-03-19, 07:41 AM
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Attic fan

I have a newer home (four years old), and the attic gets hot in the summer months. I haven't measured it, but I basically start sweating the moment I go into the attic.

I have two gable vents (one at each end of the house), a ridge vent and soffit vents.

The attic square footage is 2150 and the attic is 10 feet to the ridge, with blown-in insulation.

I'm thinking of putting an 1650cfm attic exhaust fan over the south end gable vent, to push out the hot air whenever it gets above 100F, for two reasons. First, to reduce the "wear and tear" on the roof. And second, to possibly save some cooling costs in the summer months.

Am I barking up the wrong tree? Or is this a good idea? I read opinions on both sides of the issue and thought I would get opinions here. Thanks!
Old 04-24-19, 12:47 PM
Geochurchi's Avatar
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Hi, a roofer told me not to install gable vents when there was a ridge vent and soffit venting. I had a definite mold problem on the underside of the decking as a result of gable venting.
Old 04-24-19, 05:19 PM
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Even the best ventilated attic is a inferno on a sunny summer's day. I have rental houses that have no attic ventilation and I have not noticed any difference in roof life versus those with ventilation. Shingle quality and environment seem to have more affect. If you are concerned about your cooling costs don't forget the energy cost to run the fan year after year. That money could be spent on added insulation.
Old 04-25-19, 06:05 AM
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Cover the gable vents and let the ridge vent do it's job.

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