Connect Two Bathroom Fans To One Vent

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.

Connect two bathroom fans to one vent.

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. I felt air coming from bathroom 2 s fan down through the metal duct pipe for venting bathroom 1. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.

Depending on the size of the roof jack you could use an in line fan with the suction side split between the two bathrooms. Can i use one of the roof vents for both bathroom exhaust fans we say create the shortest path between the two vents. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. 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.

Read the blog from the may 25 show and listen to the full broadcast here. Afaik if the fans you installed have built in dampers then you can wye them together and use one outlet without a problem. Turn one fan on the flap on the other one closes. Listen above for the answer.

If you want to do both bathrooms on one vent then get a remote fan. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Then add an inline fan to the remaining leg of the y adapter and run ducting to vent outside. You will use just one fan but that will connect to both bathrooms.

I think a company called fantech makes them. I vote to keep the ducts separate. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. The typical problem is that odors can migrate from one bathroom to another.

With that in mind if they were both plumbed into one vent it should be no problem right. Was replacing bathroom fan 1 and while it was disconnected from its duct pipe the fan in the bathroom 2 was on and. 3 11 02 10 03 07 pm. 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. Both washrooms must have nearly identical square footage. 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 can replace the fan opening with a grill for each washroom.

Turn both on and they both vent.