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ledmond

vent hood duct size

LE
10 years ago

We were planning to get the Zephyr Venezia, have the 8" duct installed now. This is new construction, and we are getting insulation this week, drywall starts next week. Now we are thinking of switching to the Anzio instead. I can't figure out if we can use the duct we have now or have to reduce it to 6 inches.

If we do have to reduce the duct diameter, should we do it as far away as possible? (We have a cathedral ceiling,but the kitchen ceiling is dropped, so there's a cavity there-- it could move closer to the roof-- wouldn't that make it quieter? I assume a change in diameter would increase resistance to flow and add noise.)

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