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Old 12-11-10, 08:04 PM   #5
Ryland
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There is a foils faced cardboard that you can get to build duct out of, I would say that a chunk of that with a block of ridged foam over the back end of it would work fine, slide it in place and once it's in there staple it to the toe kick.
If you are worried about it floating up, cut a block of wood to act as a spacer and glue it to the underside of the cupboard.

Last edited by Ryland; 12-11-10 at 08:06 PM..
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