Quote:
Originally Posted by skippy05
Insulation in garage attic and on the garage doors will barely be a noticeable difference no matter what anyone on here tells you to the contrary. Changing the garage door to a factory insulated one of high quality will be noticeable. Power ventilation in garage attic that isn't running on a solar panel will be noticeable.
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The problem with power ventilation in the garage is it's pulling the hot outside air into the garage so if the temperature is 95 in the afternoon, the ventilation will be pulling 95 degree air into the garage and up to the attic. I've seen several of these systems and they don't make much difference.
As far as solar attic fans, I've had both electric and solar. Today, the newer solar attic fans have a way higher rpm and can move a lot of air. Not as much as an electric unit but good enough. I had two high capacity solar fans installed and it was too much ventilation. I could hear the fans going when it was quiet. I changed one of the high capacity fans in the back of my house to one that was the next level down and that did the trick. My attic never gets more than 10 degrees hotter than the outside air and never super heats with these fans installed and I don't hear them running and that's all that matters.