NFPA 45 - Duct FDs
NFPA 45 - Duct FDs
(OP)
I am working with the NFPA 45 code (lab ventilation). Section 6.10.3 - no fire dampers in lab hood exhaust systems. Also in 6.10.3 is an exemption describing a 'subduct' system.
We are looking at this section because we are manifolding hoods into a common riser. The riser is running in a rated shaft. Does the riser need to be run in a separate (dedicated) shaft?
We are looking at this section because we are manifolding hoods into a common riser. The riser is running in a rated shaft. Does the riser need to be run in a separate (dedicated) shaft?
RE: NFPA 45 - Duct FDs