A discussion of bath exhaust fan duct work options and important details. Make sure your bath fan is vented
This Old House general contractor Tom Silva shows how to properly install a roof-mounted bath-fan vent
No matter the location of the bathroom, you can vent the exhaust fan through the wall. Ductwork is what will connect the fan to the outside. The location of the bathroom will determine how extensive the ductwork will be. You may be able to configure a short route.
Bath vent fan codes, installation, diagnosis & repair: This article series describes how to install bathroom ventilation systems, fans, ducts, terminations. We include bathroom venting code citations and the text also explains why bathroom vent fans are needed and describes good bath vent fan choices, necessary fan capacity
Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Venting through a roof vent or exhausting them in the attic could c.
What you may wish to consider than is what is called a remote or shared fan – Instead of the having a fan in both bathrooms, both simply have the exhaust ducts ran to one fan which would pull air from both baths when turned on. The nice thing about this is you will find it generally more quite in the