Can You Run Two Bathroom Fans Together

Connecting bath exhaust ducts together can result in problems.

Can you run two bathroom fans together. The classic example occurs in multifamily units if one tenant is a smoker the tenant next door can smell tobacco smoke that enters the bathroom through the exhaust fan. An additional option is to use the cvs series fan from fantech. I vote to keep the ducts separate. When inline fan is in operation air from both washrooms will vent out.

Both washrooms must have nearly identical square. The 2 fans have their own ducts but just before they vent out the roof their duct pipes are attached to a common duct upside down y which means they vent out the same hole in. You can replace the fan opening with a grill for each washroom. Can i tie two bath exhaust fan vents together.

If you are using pbh or pbl grilles grilles with built in lights the light is usually controlled by a separate light switch or switched along with other bathroom light fixtures. Was replacing bathroom fan 1 and while it was disconnected from its duct pipe the fan in the bathroom 2 was on and. I plan to add a fan to the other bathroom but want to avoid drilling a hole in my roof. If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be wondering if you can tie a new exhaust duct into the existing one.

The above scenario will work provided the following. I felt air coming from bathroom 2 s fan down through the metal duct pipe for venting bathroom 1. It is basically a fan in a box with 3 to 4 ports on the side. Then add an inline fan to the remaining leg of the y adapter and run ducting to vent outside.