Re: Bathroom ventilation fan
Maybe there isn't enough air coming INTO the bathroom to replace what the fan is attempting to exhaust? You should have a gap of at least 3/4" at the bottom of the door.
Even if you have a sufficient gap, your house may be too airtight, especially if it was built in the late 70's thru the 80's. If you have a forced-air heating system, installing a fresh air duct from the outside into the return air plenum may provide sufficient replacement air.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.