It's also a bad idea to use an existing roof vent for bathroom exhaust. You'll partially block the vent with the duct pipe, ...

An inline — or remote — exhaust fan is a type of home ventilation fan installed ... a single exhaust duct exits through the ...

I am reroofing the house and have a question about roof venting. Most houses in the neighborhood have ridge vents on all their ridges. Some have electric vent fans, and one house has a fan powered ...