| http://www.w3.org/ns/prov#value | - by ygmir ?? Sun Mar 11, 2012 12:40 pm yeah, ok.......I thought maybe you were referring to the thin walled materials......he is why the CO idea sort of threw me.There is a formula, for flu size vs door opening, as far as keeping it from smoking when open, and I am sure it is good in general.I think your flu needs to be 1/3 your opening size......but he is just from memory.and, with a good flu, you
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