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Old 05-31-2014, 04:28 PM   #1
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Ventilating bathrooms, different floors, available shaft


In removing our old boiler system, I now have a 2x2 shaft that runs from my basement bathroom, adjacent to my upstairs bathroom, through the attic, and ends with a sort of fake chimney on the roof. The basement bathroom has no vent and the upstairs bathroom vent just dead-ends in the attic. Is this shaft useful for either one of those efforts or do I need to go more lateral for both - and, if not, anything useful and fire-code friendly that we can do with this shaft?

We're in the mid-Atlantic, if that's relevant.
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Old 05-31-2014, 05:22 PM   #2
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Ventilating bathrooms, different floors, available shaft


Get a central venting fan. Ducts will run from those rooms that you wish to exhaust up that stack. To the fan unit. As for that chimney. It does not appear that there is a cap on it. You may have to special order, or have a local metal shop fabricate one to keep the rain and critters out of there.

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Old 05-31-2014, 10:17 PM   #3
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Ventilating bathrooms, different floors, available shaft


Thank you-

It's capped - it just looks open in the image. The "chimney" is really mostly-rotted plywood with a fake brick material around it and a metal cap. Years ago, we wrapped it in aluminum for strength/leak-proofing. I'd like to replace it though if there's no real reason to have a four-foot white pillar on our roof.
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Old 05-31-2014, 10:21 PM   #4
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Ventilating bathrooms, different floors, available shaft


You could shorten the duct and have just a vent cap, poking out of the roof. Versus the chimney. I would take it down below the roof deck, and then leave enough of the vent pipe to allow you to place the vent in the patched up section.

The question is. Do you have Shingles to patch the area? If you have a local ABC warehouse. A local roofer can get the materials needed for the vent and repair. The multi-room duct. You can order online usually cheaper then getting at a big-box store.
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