Going to get a new roof put on (I hope!) Anyway I thought I would try to
locate any vents that are "dead" so that we could just pull them out.
I found this vent coming out of the AC return duct that goes up and through
the roof. A lot of warm air was going out this vent! But the roofer couldn't
understand why there would be such a vent, and neither can I. The air coming
from the house and through the return ducting isn't all that hot.
If you are willing to offer your advice, please check out this webpage which
has a couple of pictures of the vent from inside the attic.
(sorry if this you get any popups when you visit this page.)
Since it's in the return line, my guess is it was a misguided attempt
to provide a fresh air inlet. You might want to ask your AC
repairman, but I'd be inclined to remove it and block the opening in
I suggest you call a pro and have them look at the installation. I do not
know where your located, if you were in swamp cooler country, it could make
some sense except for the damper handle installed that way. My SWAG is that
they had a whole house fan ventilator before the a/c when in.
If it's in the return duct, then air isn't going out, it's coming in.
I agree with the poster that said with the damper, it looks like a way
to use the blower to bring fresh air into the house when the damper is
open and only the blower is running, not furnace/AC. I'd get rid of
that setup pronto. Hopefully the damper was closed, cause if it were
open, you'd be sucking in a lot of outside air while trying to heat or
cool. And it looks totally impractical, as to fool with it, you have
to go into the attic and it's very easy to leave the damper open and
forget about it. And for what benefit? If you want some fresh air
that way, just open a window!
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