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Old 12-08-2013, 10:38 PM   #1
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smallest duct size ?

my bathroom has a 6" ducting. i have both the duct valve and the register closed. i would like to have a little heating in there, as much as what is leaking past now. but as it is now, because of such a low flow, i get cooler air. if i have a small duct, the duct would not cool the air, as the flow would be much faster through the smaller duct.
so, what is the smallest ducting avaliable ?


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