Best temp to set attic fan thermostat?
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Answers:
Answer number one makes a good point. What are you trying to achieve? Attic temps can reach 130 degrees here in the States, even those Northern locations.
Consider that in the most strict sense fans are meant to COOL people, NOT rooms, although to extract heated air an attic fan will give modest results.
I'd probably have the fan on a timer as opposed to a thermostat, and NOT use it when the outside air is at a tolerable level.
You also don't state whether of not you USE the attic, for what purpose.
You'd likely get equal results by upgrading insulation, to aid in the cooling. You also don't state your location. Venting heat in an Attic/Upper level crawl space can also be aided by ridge vents, etc. In using an attic fan, it might serve you well to have an opposing vent allowing ACTUAL circulation, considering that outside air will always be somewhat lower in temp than the "stored" heat in an attic.
Steven Wolf
depends on what outcome you want. If it were my house i would set it around 110 + or - 5 degrees
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