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Old 2009-08-06, 6:36pm
Dale M.'s Avatar
Dale M. Dale M. is offline
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Join Date: Jun 10, 2005
Location: A Little Bit West of Yosemite Valley
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Quote:
Originally Posted by JoeDeM View Post
Nowhere, but I prefer to use a larger duct to reduce the friction loss, at 1.07 you lose as much as 20 to 30%, granted at 900cfm even with the loss it would be acceptable, besides you yourself always recommend at least an 8" duct anyway. Also running at a lower fpm reduces the noise level as well.
Yes I always recommend larger duct, but in this case hood only has 6 inch opening, and if one is going directly into a 90 degree turn and out through a wall... With less than a total of approximately two-three feet of duct, it really is not going to make much difference.... If it was 20 feet I would yes go to larger duct, but with such a short run I see no advantage ...

Dale
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