attic vent questions

1422 Views 3 Replies 4 Participants Last post by Chemist1961, Jun 13, 2009

Grimace

Discussion Starter · Jun 12, 2009

I have an approx 1500sf hip roof on a single story ranch and I'm about to install an electric attic vent in place of the middle of 3 current passive vents which are only about 50si each and have a few questions.

First, what is the best way to block off the other 2 passive vents so the fan does not suck air from them? I'm not reroofing soon so external appearance will probably remain the same. I do have a partial bundle of shingles though if its not too hard to patch. (I'm adding plenty off soffit vents so I'll have adequate intake)

Second, what kind of roofing nail should I use? There seems to be so many types and I'm not sure which to get?

Thanks!

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Chemist1961

· #4 · Jun 13, 2009

Don't know much about these fans but I would do some homework before taking the big plunge. A fan with no air inflow only creates a vacuum.

Could you solve this by adding more top vents and increasing intake through soffit area? There needs to be a balance of flow coming in as well. Try re posting this under roofing for more feedback

Didn't see what are you live in, is the heat extreme?

Check out this site www.buildingscience.com for attic ventilation inf.
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