Does the "intent" of IFC Section 907.3.1 require addressable system type duct detectors?

[Simonsays]

In your opinions, does the "intent" of IFC Section 907.3.1 require the installation of addressable system type duct detectors? "Activation of a duct smoke detector shall initiate a visible and audible supervisory signal and shall perform the intended life safety function in accordance with this code."

 

[mtlogcabin]

Yes if duct smoke detectors are required by

[F]​

Duct smoke detectors complying with Section 907.3.1 shall be located as follows:

1. 1.In the main return air and exhaust air plenum of each air-conditioning system having a capacity greater than 2,000 cubic feet per minute (cfm) (0.94 m3/s). Such detectors shall be located in a serviceable area downstream of the last duct inlet.
2. 2.At each connection to a vertical duct or riser serving two or more stories from a return air duct or plenum of an air-conditioning system. In Group R-1 and R-2 occupancies, a smoke detector is allowed to be used in each return air riser carrying not more than 5,000 cfm (2.4 m3/s) and serving not more than 10 air-inlet openings.

 

[Simonsays]

The 2021 edition of the IFC.

 

[Spiltchaos]

Hi Simonsays –

IMO the answer is no. The IFC does not dictate the type of system, e.g., addressable or conventional. Section 907.3.1 does not state anything about addressable nor is it implicit in the requirements of that section that would lead me to that conclusion. I feel that it would be “reading into the code” if someone feels they are required to be addressable. Another thing to consider is that NFPA 72 does not require addressable systems/devices either and manufacturers still make conventional panels and devices, as well. There are some jurisdictions that have requirements for addressable systems that I have run across but not the model code. Although not required to be addressable, they must be connected to the fire alarm system (assuming it is a required system) so the system installed would drive how you are likely to monitor it. Hope this helps.

 

[Gregg Harris]

Hi Simonsays –

IMO the answer is no. The IFC does not dictate the type of system, e.g., addressable or conventional. Section 907.3.1 does not state anything about addressable nor is it implicit in the requirements of that section that would lead me to that conclusion. I feel that it would be “reading into the code” if someone feels they are required to be addressable. Another thing to consider is that NFPA 72 does not require addressable systems/devices either and manufacturers still make conventional panels and devices, as well. There are some jurisdictions that have requirements for addressable systems that I have run across but not the model code. Although not required to be addressable, they must be connected to the fire alarm system (assuming it is a required system) so the system installed would drive how you are likely to monitor it. Hope this helps.

I would agree. One is required but not specified as to what type