You should probably have holes in your roof. A lot of them ... both more efficient and less powerful than electric exhaust ...
Some have electric vent fans, and one house has a fan powered ... the space under the roof seem as close to conditions on top of the roof as possible. When it’s very cold and snow is on a ...
The Family Handyman on MSN1mon
How To Install a Bathroom Roof Vent
Purchase the exhaust fan (if you don't already have one) and a roof vent. Roof vents can be dome ... shingles below the hole ...