NFPA 72 Requirements for Duct Smoke Detectors

NFPA 72 Chapter 17.7.5 Smoke Detectors for Control of Smoke Spread. This week is all about what the NFPA 72 has to say about duct detectors.

[@diona.906]

another thing worth mentioning is AHJ. Sometimes depending on your local regs you may have to follow IMC code and not NFPA.

[@Kerry_kit_slayer]

very helpful thank you

[@PyrotexSystems]

You're welcome!

[@bartwisdom6612]

I see a bunch of guys just cutting the sample tubes to fit and not paying attention to the holes in the tubes. I didn't catch you mentioning anything about the number of holes in the sample tube. Is there somewhere in NFPA 72 that address this?

[@mikedickinson9730]

Great video. Just out of curiosity, what is the code on requirement for holes in the sample tube for a 22 inch duct?

[@Frank-tv6xo]

Can you mount a duct detector inside the air unit at the beginning of the supply?

[@jamesfactstechnologies5200]

How many duct detectors can be installed in a loop.?

[@PyrotexSystems]

That entirely depends on the manufacturer of the parts. There is not a code limiting that.