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Old 12-30-2009, 02:04 PM   #1
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Should I change this vent to a higher chimney style one?


My microwave hood vents through a pipe that goes through the attic and then comes out the roof on a small vent about half a foot high that is basically like a U duct pointing down. The problem is the snow pretty much covers the opening. I can still see the vent from outside but that's just because we don't have much snow this year.

Should I replace this to a higher one, maybe a chimeny vent? Should I also avoid using the fan this winter? There was mold damage on the drywall in the kitchen which had to be removed and replaced and I'm thinking it was maybe caused by this.

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Old 12-30-2009, 03:12 PM   #2
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In areas with a lot of snow the vent should be a minimum of 12"

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Old 12-31-2009, 11:14 AM   #3
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Your chinmey should be 3' higher than you ridge


Quote:
Originally Posted by Red Squirrel View Post
My microwave hood vents through a pipe that goes through the attic and then comes out the roof on a small vent about half a foot high that is basically like a U duct pointing down. The problem is the snow pretty much covers the opening. I can still see the vent from outside but that's just because we don't have much snow this year.

Should I replace this to a higher one, maybe a chimeny vent? Should I also avoid using the fan this winter? There was mold damage on the drywall in the kitchen which had to be removed and replaced and I'm thinking it was maybe caused by this.
Your chimney should be higher than your ridge line, the vent stock should melt the snow automaticlly from the hot water from showers, and any water usage.
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Old 12-31-2009, 01:28 PM   #4
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Being a microwave/range hood, any grease that doesn't get caught in the filter at the unit will be pushed through the ducting. With the ducting making the 180* turn above the roof, coupled with the major outdoor temperature change there, any warm moisture/grease will be deposited on the double elbow air restriction.

Be safe, Gary
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17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?
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