I'm currently remodeling my kitchen. Instead of a cooktop hood, I plan to re-use the existing ceiling exhaust fan. It looks to be about a 8" diameter fan that is inside a 10×3.25 duct that exhausts outside. The fan motor is shot, I will need to replace it.
The issue I have though is when I removed the bulkhead (see post here), it was revealed that I had a leak from that exhaust duct. From the outside I can see that the exhaust flap is stuck partially open, and from the inside I can see the duct has some openings where moisture can run down onto the 2×10 my floor joists rest on.
My intention is to replace the fan and replace the exhaust flap, however, I cannot find a new exhaust flap that is intended for 10×3.25 duct to exhaust outside. I'm thinking that's an usual setup. But given that I now have this opening in my masonry outside, I need to fill it, and I'd like to use it. Where should I look for a replacement/what are my alternatives?
A secondary question – I assume there is no chance I can find a replacement motor for what is probably a 1940's exhaust fan. Is there a common/standard size that maybe I could only swap the motor? Or is my only solution to cut out the drywall and the duct and install a new exhaust fan box?
Thanks
Best Answer
10 x 3 1/4 seems to be a standard size. Any big box store should have them.