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Old 06-05-2014, 01:48 PM   #1
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HVAC vent under bathroom vanity?


I found some excellent posts here on whether or not you need a duct in enclosed space under a vanity. In my old (1981) vanity, that I just removed, the air came up from the floor into the enclosed space under the vanity then out a vent in the toe kick -- no duct, it worked great.

But my problem is different now. The vanity I bought has short legs -- no toe kick, no enclosed space underneath. The clearance from the floor to the bottom of the vanity is just 2 1/2". The HVAC duct (6") comes up from the crawl space through the floor, 4" in from the wall.

I could install a floor vent under the vanity, and air would, more or less, find it's way to the room. But mostly, wouldn't I be making the vanity itself nice and warm/cool? I'm not very concerned about the air hurting the solid wood vanity (like from expansion/contraction, and I donít see how a vent underneath would be much different for the vanity than air going into enclosed space under a vanity) -- my concern is how inefficient it would be for heating and cooling the room.

But I don't know what else to do (short of moving ductwork in the crawl space to a location not under the vanity; it's a tiny bathroom and a horribly cramped crawl space, I'm really not up for that) -- any suggestions?

Thanks! ... Rick
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Old 06-05-2014, 02:10 PM   #2
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Quote:
Originally Posted by RickSK View Post
I found some excellent posts here on whether or not you need a duct in enclosed space under a vanity. In my old (1981) vanity, that I just removed, the air came up from the floor into the enclosed space under the vanity then out a vent in the toe kick -- no duct, it worked great.

But my problem is different now. The vanity I bought has short legs -- no toe kick, no enclosed space underneath. The clearance from the floor to the bottom of the vanity is just 2 1/2". The HVAC duct (6") comes up from the crawl space through the floor, 4" in from the wall.

I could install a floor vent under the vanity, and air would, more or less, find it's way to the room. But mostly, wouldn't I be making the vanity itself nice and warm/cool? I'm not very concerned about the air hurting the solid wood vanity (like from expansion/contraction, and I donít see how a vent underneath would be much different for the vanity than air going into enclosed space under a vanity) -- my concern is how inefficient it would be for heating and cooling the room.

But I don't know what else to do (short of moving ductwork in the crawl space to a location not under the vanity; it's a tiny bathroom and a horribly cramped crawl space, I'm really not up for that) -- any suggestions?

Thanks! ... Rick

Something like this

http://www.amazon.com/Extend-Vent-Deflector-Register-Extender/dp/B005AZ5KM8
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Old 06-05-2014, 02:25 PM   #3
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Another idea is to block up the vanity except where the duct is and run base molding around it and cut hole in base molding for duct.
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Old 06-05-2014, 08:01 PM   #4
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Thank you Rexamus!, perfect, the kind of simple that makes me wonder why on earth I didn't think of it in the first place. I might make a nicer looking one, or go for the $21 plastic one from Amazon, but anyway, thanks much.
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