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Lacustral wrote:
> I would like to use an exhaust fan (fan from a ceiling grille to outside)
> to run overnight in the summer, with the windows open, so that my
> house is cool in the morning. I am not sure how much CFM is needed.
> I do not want a big powerful whole house fan because I would like it to be
> quiet. Just a small
> fan that keeps running overnight.
>
> If you're using a fan for that purpose, can you tell me how much CFM
> gets your house down to the temperature of the outside air, and how
> many cubic feet of airspace you're ventilating, and how long does it
> take to cool
> the house down to the outside temperature?
>
> Just trying to get a ballpark idea.
>
> (I could calculate the cubic feet of airspace in my house, divide by
> CFM
> of a fan, and come up with a guess, but I am sure it's not that simple
> -
> the hot stuff in the house is heating up the air, fans aren't
> completely efficient about clearing out the inside air, etc.)
>
> Thanks
> Laura
Get a good LARGE whole house fan that offers more than one speed. The
larger size fan will move more air with less noise.
--
Joseph Meehan
Dia duit
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Re: fanpower needed to cool house overnight
