Remodel to existing furnace system.

[BayPointArchitect]

Given:

Three story six-plex apartment unit with existing ductwork passing through the interstitial floor-ceiling space.

IBC 712.4 would require a fire damper where supply duct from furnace penetrates through the fire-rated drywall ceiling and then radiation dampers at each air diffuser. But that is NOT the case with these ducts that pass in and out of the rated floor-ceiling assembly.

Question:

Considering that these apartments are replacing the furnace and air supply diffusers, is there anything in the code that require these existing conditions to comply with current code?

Thanks

---------------------------------

AIA, NCARB, ICC, NCOA, CSI

ICC Certified Building Plans Examiner

 

[mtlogcabin]

2006 IMC 102.2 Existing installations.

Except as otherwise provided for in this chapter, a provision in this code shall not require the removal, alteration or abandonment of, nor prevent the continued utilization and maintenance of, a mechanical system lawfully in existence at the time of the adoption of this code.

I do not believe you can require the fire dampers.

If they change the ceiling air diffusers then you could require the radiation dampers. JMHO