Our clothes dryer vent has a recommended outside louvered cover, the type
with 4 horizontal flaps. The louvers are clear, close properly, and work
well. The pipe from the dryer to the wall is only 6" long. The exterior
cover is well caulked underneath, and the inside of the vent opening is well
In the winter (now!) the cold air still enters the dryer when it's not in
use, and the cold radiates from the dryer sides and bottom.
Is there anything I can do to stop the cold from entering? Other than
installing an open/close "valve" on the vent, which is not feasible and
would be dangerous, I can think of nothing.
Try one of the inside/outside valves. When the flap is switched so the
drier vents inside, it will block incoming air. Once some lint builds up,
it may seal even better.
Come to think of it, lint buildup may be preventing the louvers closing all
the way. Have you cleaned it lately.
A longer vent pipe that loops up and back down will form a sort of trap for
the cold air (like an upsidedown P trap). If your drier vent opening is
lower than the wall vent, cold air will fall into the drier.
I just installed one of these dryer vents on a clients kitchen exhaust.
6" vent on a huge overhead exhaust hood. She was stuffing rags in the
flapper that was there originally because these was an actual wind that
would come out of the vent. When she wanted to use the hood she had to
run outside and remove the rags. I found these on the net. At first I
was skeptical but the more I looked at it and thought about it I had
one of those "why didn't I think of this" moments.
It works very well. Not a hint of a draft. We ordered two and the next
one goes on her dryer.
Yes Spudnutty, that is what I have the Baticdoor, it works, it must be
cleaned of lint once in a while and painted if sun hits it or the
plastic will deteriorate. But it is the only thing I saw , its design
seals out drafts, but a bit of cold air comes in through convection of
the plastic. Mine is 3 years old. got it a Menards.
Hey, this thing looks good. Does anyone know if a similar thing is
available for a 3 1/4 x 10 rectangular duct that comes out of our
kitchen exhaust vent? I can't easily change that to any other ducting
As others have suggested--most of the time the problem is a build up of lint
that prevents the louvers from closing completely. Every once in a while I
have to take a sharp point and dig the lint out of the hinge points to stop
the cold air from getting into the dryer.
Wouldn't a single flapper for the outside vent seal better than those
Unless you have a high efficiency furnace/boiler with outside air supply,
did you ever think that maybe your heating system is not getting enough
air and is sucking it in through the dryer vent?
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