For a kitchen remodel, I am adding a range hood with the exhaust vent through the roof. The roof pitch is 4/12. Gas’s range is on the first floor of a ranch house on an exterior wall with a standard soffit. My question relates to placement of the roof vent. If I go straight up with vent it will be 39 5/8″ from first shingle to center of the 8″ vent pipe and 60″ from center of valley to center of the 8″ vent pipe. I live in central Iowa so snow/ice are an extra variable.
Is this an okay placement or should I move it further from up the roof and/or further away from the roof valley. If so, what should be the minimum distances I should use? I couldn’t find or don’t know the related building code for this.
See attached picture for general idea. Let me know if any other details would be helpful.
Thanks for the help!
Kory
Replies
I would go straight up. the worst that can happen during a heavy snow is that the vent will not work.
this is not like a furnace vent or water heater vent that can kill you.
even a gas stove is set up to operate in an occupied space.
make sure there is a flap to close off when the fan is off. most hoods have these.
Pay good attention to how the vent installs related to the shingles.
Thanks for the advice!
If the hood is wider than 30", consider placing the fan motor outside - at the vent. The ones in the hood are pretty loud. I've never had a customer regret putting the motor outside.
Frankie
I didn't even know this was a thing. Do you have any pics you can share?
Is there any option to go out the wall? When I did mine, many people advised against messing with the roof. Since my stove was on an outside wall and I had attic space above it was pretty easy and I don't have to worry about future leaking.
Fantech solutions, but there are others if you Google External Kitchen Exhaust Blowers. Many different price points.
https://www.hvacquick.com/products/residential/Kitchen-Exhaust/Kitchen-Exhaust-Fans/Fantech-RE-fans
Alternate -
https://www.homedepot.com/p/Broan-NuTone-External-600-CFM-Blower-for-Broan-Elite-Series-Range-Hoods-331H/100065122
Be sure to get the one which has the needed CFMs and is rated for kitchens. If you oversize, you'll have to get a different transition duct coupling. The hood install manual will have the run length ratios per duct diameter.
Hope this helps,
Frankie