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Old 08-26-2011, 11:13 AM   #1
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Old furnace vent from crawl to roof


We are going to put a new roof on our one story brick rancher. There is a gas furnace exhaust vent that goes from the crawl space up through the roof.

The furnace is not there anymore, so this is just connecting air in the crawl to air above the roof.

I want to get the roofer to remove the part above the roof, patch the hole and put the new roofing over it.

What should I do with the rest of the duct? Leave it open at both ends? Close one or both ends? How?

I'd rather not remove the duct entirely because then I'd have to patch holes in the ceiling and floor. The duct is in a bedroom closet.
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Old 08-26-2011, 11:37 AM   #2
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Old furnace vent from crawl to roof


Have the roofer install new decking and shingles, you may cap either end. With one end capped there will be no flow.

You should think about removing it just from the stand point of the gained space you will get.

Mark

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Old 08-26-2011, 12:08 PM   #3
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Old furnace vent from crawl to roof


I am in the same predicament, I removed a water heater and am now contemplating removing the Transite vent and using the roof opening as the vent for the bathrooms.

As suggested by John, just the space gain in the closet would be nice.
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