Under Cabinet range hood install help

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kmloughran

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I am in the middle of a Kitchen remodel (first time for me). I ordered all new appliances including range hood. I took the old hood out, and had it hauled away. Problem is that I didn't notice that the vent to the outside was offset in the back. So the hole to the outside in my wall is not centered, and I now have no idea how to get a hood installed with the offset vent. (there is a stud preventing the centering of the vent). it's off by 3 inches (12.5 inches to one side 6.5 to the other)

can anyone tell me if there is a hood out there that allows for this? or what I should do??? is it possible to just lose 3 inches of venting and vent out of a smaller opening? by leaving it offset?

thanks all.
Kev

range vent.jpg
 
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Kev

I didn’t see your question when you first posted and thought I would give it a bump in case you haven’t figured it out yet. If you did what did you come up with.
 
This project appears on two posts .... the other one is where people are participating
 
A weatherproof multispeed duct booster fan on the outside wall surface or inside the wall may help if you need to downsize the recommended hood duct size or the limit on duct elbows.
Many small holes sort of equals one large one.

Kitchens are supposed to have 15 air changes per hour (ACH) and 15/60 air changes per minute, but good luck on measuring what you end up with.

I saw an HVAC Site where they timed how long it took to inflate a large plastic bag in order to measure CFM.
If you want to do this I'd use the very thin plastic bags that dry cleaners give you and tape several together to make a very long tube.
 
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The vent hole ended up only being slightly offset. I measured and found that I only lost 2 inches of a 10 inch vent opening. So I put a sealer on my wall (where the overlap was) bought a fan with a much higher CFM than I needed (to compensate for the lost space), and put it up. After 4 solid cooking sessions, it seems to be working perfectly.
 
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