venting hood into bathroom vent?

lisa2416wvSeptember 4, 2013

I am planning a kitchen overhaul and have hit so many road blocks. Here is my last one I hope. I need to add a vent hood for a gas AGA stove. I either need to go up 7 feet, through a drop ceiling(drywall) and over 8 feet to an external brick wall OR go up about 7 feet and tap into the vent tube from the bathroom which is located behind the wall. It looks like that vent is only a 4 or 5 inch circle though. What option is the right one?

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If you go up, it needs to continue on through the roof with the minimum 6" vent. 8" would be better as a 6" duct can't really do much past 500 CFM successfully. If you can't do another roof penetration (why not???) then up and over would be the best choice. I'd upsize the CFM and ductwork to 10" if you are going to do that.

    Bookmark   September 4, 2013 at 1:31PM
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Kristen Hallock

My stove vent specifically says NOT to use flexible pipe venting. My bathroom vent is one of those flexible pipes.

    Bookmark   September 4, 2013 at 1:56PM
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OK that makes sense. I cant go up straight through the roof because I have a 3 story brick home that has not been drywalled, but I can do the up and out the wall with its own vent I think. Thank you

    Bookmark   September 4, 2013 at 2:42PM
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