Connect Two Bathroom Fans To One Vent

I vote to keep the ducts separate.

Connect two bathroom fans to one vent.

Then add an inline fan to the remaining leg of the y adapter and run ducting to vent outside. Connecting bath exhaust ducts together can result in problems. No you may not connect two fan discharges to a single roof jack the proper name for the roof outlet. Only draw back is that both rooms will be vented at same time.

I think a company called fantech makes them. With that in mind if they were both plumbed into one vent it should be no problem right. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.

I just installed two panasonic bath fans in two adjacent rooms and joined them together in the attic it works fine with no backdraft from one fan to the other. When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. You will use just one fan but that will connect to both bathrooms. You can replace the fan opening with a grill for each washroom.

Listen above for the answer. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. The typical problem is that odors can migrate from one bathroom to another. The above scenario will work provided the following.

Afaik if the fans you installed have built in dampers then you can wye them together and use one outlet without a problem. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Read the blog from the may 25 show and listen to the full broadcast here. 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.

A two in one diverter will allow this to happen. Turn one fan on the flap on the other one closes. 3 11 02 10 03 07 pm. Depending on the size of the roof jack you could use an in line fan with the suction side split between the two bathrooms.

When inline fan is in operation air from both washrooms will vent out. Both washrooms must have nearly identical square footage. Was replacing bathroom fan 1 and while it was disconnected from its duct pipe the fan in the bathroom 2 was on and. Can i use one of the roof vents for both bathroom exhaust fans we say create the shortest path between the two vents.

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.