Re: Basement Bath Exhaust Fan Routing
Canuk brought up an important point about combustion appliances. You can provide combustion air for these appliances by running a 4" duct from outside to near the furnace or water heater. If you insulate and seal the room with the furnace, you shouldn't see too much energy loss; that room would effectively be "unheated" as if the appliances were in an attached garage.
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.