Hood Cap
until I discovered that the air seems to come from outside, even when the fan is not running. I'm was on the roof and looks the roof vent cap and there is nothing to prevent wind blowing into the duct system. How do I fix? No flap behind the exhaust fan. http://www.nutone.com/product-detail.asp?ProductID=975
See page 2 to Figure 3 of the installation section of the link you provided. It shows the location of a buffer of 7 " vertical line connection. You will need a 7 "clash of a store or home store and plates installed inside the duct (about $ 8). Most use a mechanism to stop the weight can be adjusted so that the log will open with the slightest updraft when the fan is turned on flop and closed when you go. This is very important for proper functioning, but in situations of strong wind, which can be sucked open. It is inevitable, but no project slows should occur. On the basis of its design, which does not seal 100% – that a jam in the channel – but it will reduce air flow significantly. Good luck!
ME,KIWI,HOOD,CAP AND PROFIT CHILLIN ……..
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