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Jun 18, 2009 | 08:58 PM

#11 (permalink)

InfernoRedXfire

Senior Member

Joined: Jul 2007

Posts: 7,951

Likes: 9

From: Dallas, the Republic of Texas

Re: attic fan?

Quote:

Originally Posted by manisusmc

thanks for all the advice I switched it to 90 from 120, my insulation is 7-8 inches thick not sure the r-value.

There are a lot of good points posted here. I was a little quick in my response and I apologize for not providing more detail. At 7-8 inches of insulation, you are probably at about R-30...depending on the type of insulation.

As an architect, I have a few points I'd like to address about what has been posted and a few things that haven't been addressed. Unfortunately, I don't have the time tonight to write it up but will try to post it tomorrow.

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