overhead exhaust fan in kitchen

i noticed i'm getting a LOT of cold air coming through it, is there some kind of product that i can spray (a foam) to close it off that won't cause any problems?
thanks for any help
FH
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WHoME? wrote:

I don't think you really want to close it off, but there are covers that will fit over the vent to close it off and you can open it back up. Take a look at the DIY store. You also may find that the damper (a valve that keeps air from coming back through the vent, is defective or needs to be cleaned.
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On 11/30/2004 11:42 AM US(ET), WHoME? took fingers to keys, and typed the following:

Yeah. That's one of the problems you get when you provide access from the outside to the inside. Even if the fixture provides a means to close the vent, there's always some leakage. If you are sure you will never use the vent again (no one cooks?), take off the face plate, or filter housing, or whatever, and stuff something inside to block the air flow, like a piece of styrofoam, fiberglass insulation, or even a piece of cardboard. Placing any kind of spray in foam or other permanent solutions may not sit well with the next tenant (and landlord), or next owner.
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FH wrote:>i noticed i'm getting a LOT of cold air coming through it, is there some

Maybe you could fit a barometric damper in there... Tom Work at your leisure!
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Check to see if you have a damper in place. Sometimes, the damper is stuck open.
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i completely apologize, i didn't make myself clear at all... it isn't the vent or dampner, it's the exhaust tubing itself ( i don't know what it's really called). the large metal tube that comes down from the attic to the exhaust fan. all around the tube (where the wood cabinet is), is what i'm talking about.
hope i made it clearer (probably not). lol
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