bath fan vents - combine with Y to one large roof jack?

Discussion in 'HVAC Heating & Cooling' started by lifespeed, Jan 25, 2012.

  1. lifespeed

    lifespeed Member

    Apr 27, 2007
    I have two bathrooms that share a common wall. I installed a Broan combination 110 CFM fan/light/heater in one with 6" sheetmetal outlet to an AirKing PRC6R roof cap. It works great, vents the bathroom very quickly and quietly, and the wife loves the heater.

    I want to add a Broan fan with a 6" outlet to the other bathroom. It is 110 CFM.

    I don't really want to punch another hole in the roof unnecessarily. I think the 6" sheetmetal ducting should be more than enough, even in the unlikely event both fans are running simultaneously. And when only one is on, the other should prevent backflow with the integrated damper, right? And the Y junction should help at least direct the flow in the right direction.

    Or is my thinking totally wrong?
    Last edited: Jan 25, 2012
Similar Threads: bath vents
Forum Title Date
HVAC Heating & Cooling Distance between heater vent and Bathroom Fan vent Jul 31, 2017
HVAC Heating & Cooling Permanently Installed Bathroom Dehumidifier Jun 22, 2017
HVAC Heating & Cooling Can a bathroom vent exhaust duct be TOO short? Jan 30, 2017
HVAC Heating & Cooling Correct Duct Size For Bath Remodel Jan 11, 2017
HVAC Heating & Cooling Radiant Floor Heat in Bathroom and other ramblings... Jan 7, 2017

Share This Page