Two Bth Fan Use One Roof Jack

Can i use one of the roof vents for both bathroom exhaust fans we say create the shortest path between the two vents.

Two bth fan use one roof jack. Afaik if the fans you installed have built in dampers then you can wye them together and use one outlet without a problem. Harold from illinois asks i have two bathrooms back to back. I vote to keep the ducts separate. Most roof caps for bath fan exhausts have a light aluminum backdraft damper which rests on a sealant strip which is basically a foam piece of weatherstripping.

This sealant strip is installed to keep cold air from coming in and according to a broan customer service rep it also helps to prevent unbearable metal on metal chatter. 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. Was replacing bathroom fan 1 and while it was disconnected from its duct pipe the fan in the bathroom 2 was on and. Each fan vents separately out the roof.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. I felt air coming from bathroom 2 s fan down through the metal duct pipe for venting bathroom 1. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. 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.

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. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. The typical problem is that odors can migrate from one bathroom to another.