Fire Dampers in 2 family house (New Jersey) - Contractor Talk - Professional Construction and Remodeling Forum

Andy4SC · 01-08-2009, 03:43 PM

We are doing a new HVAC system in Hudson county in NJ for 2 family house. I haven't worked in that specific city for a long time (Jersey City) and building inspector asked us to put in fire dampers everywhere.

We've been doing HVAC in other counties and towns for a while and no one asks for fire dampers in single and 2 fam residential buildings. Has anyone been asked to do the same?

tom m · 01-08-2009, 06:28 PM

I know some of those guys......many are new but regardless any duct passing through a rated wall needs protection. Its logical. Something dont seem right ask them there concerns.

A.D. Const · 01-08-2009, 10:20 PM

Jersey city Officials are kind of critical

, but thecnically speaking, the pervious post is right, you do need it anytime you are penetrating a fire wall.

Dr Heat · 01-13-2009, 06:03 PM

you only need a fire damper if the duct is open to both units. 26 ga duct gives you a 2 hour ratting, but you cant have openings in two envelope spaces without a fire damper.

But, local codes may very