Attic fan replacement

jwalker678April 10, 2011

Have a whole house fan that is 15 yrs old. Installed in hallway ceiling on 2nd floor of 3,000 sf house. I have been told I have big leakage through the fan grll and should either replace fan with one that provides good seal or ditch the fan and just seal the grill space. I am in the Midwest and maybe use the fan 20 days before have to use ac.I am guessing the cost differential between new fan or fill-in is $500 range. Is there much savings over ac usingthe fan?

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Can you solve your problem by seasonally sealing/insulating the existing unit?

"Is there much savings over ac usingthe fan?"

Offhand, I'd say yes, if the fan produces an acceptable comfort level.

    Bookmark   April 12, 2011 at 5:07PM
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Hadn'tthought about that but possible.

    Bookmark   April 12, 2011 at 7:18PM
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There are covers designed to sit on the attic fan when not in use that are built out of foam that can be laid over the fan when not in use. I built a fan cover for a neighbor and it wasn't bad. I put a 6" wide strip of plywood around the unit and sealed any gaps to start. I then built a cover out of plywood and 2" foam and added some guides so it would slide into place. I ran a small cable from the box to a pulley on the roof over to the attic hatch so it can be raised and lowered.

I would after learning about the prebuilt covers adapt one of these with a thin plywood stiffener for the cable. go that route. On cooler days or evenings the attic fan really feels nice.

    Bookmark   April 16, 2011 at 11:46AM
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