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Old 2018-11-21, 10:47 AM
Kafer Kafer is offline
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Default Fan ducts through attic

I'm looking for tips on running a duct through an attic. For reference, please see here on the issue I am experiencing. In short, I have spent a bunch of time and money trying to properly vent a range hood fan and bathroom fan through the roof without it leaking back into the house.

I'm going to try attempting to vent out of the soffit area, but unsure on how to do this. My plan is to run an insulated duct in between the ceiling joists to the soffit area. Is it ok "raise" the duct up and over the beam running along the edge of the attic? I'm worried that it may condensate and water may pool up in this area.

Any tips or tricks on how to install a soffit vent? I was thinking of going into the attic, and sticking a pencil through the soffit (if I can fit my arm in there), then going outside and cutting a hole and installing the vent.

Hoping someone can offer some advice... thanks in advance!
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Old 2019-05-25, 03:39 PM
Halton Home Inspector Halton Home Inspector is offline
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Better late than never to comment.

Venting out the soffit is never as good going out the wall or out the roof. A proper vent that is properly installed on the roof will not leak.

There are very few soffit type vents and most of them are poor quality. One problem with venting out the soffit is that most exhaust air is warm so the exhaust rises as it goes out the vent right back up into the *open soffits which then ends up in the attic.

*Open soffits - are the soffit with little holes in them. There is also solid soffits with no holes but builders don't use that material much anymore.
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Last edited by Halton Home Inspector; 2019-06-04 at 09:31 AM.
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