My bathroom fan is about 30 yo Nutone Model 8831 FWIW. It does not move a
lot of air, as it's rated 76 CFM, but adequate, since it's 1/2 bath w/o a
The falp valve spring has rusted out and it no longer closes, which in a
winter caues a draft. The fan is mounted in wall. I would try to fashion a
spring for it, if I could remove the fan, but it seems that I would have rip
the wall apart (it's drywall).
Hate to thrash a working fan for a tiny spring, but there's no way to do
anything with the fan in place.
Anyone been successful with a similar project?