Are others experiencing AHJ's requiring that sprinklers placed in ceiling tiles directly adjacent to HVAC ceiling tile diffusers either be moved to at least 2'-6" away or replaced with intermediate-temperature rated sprinklers?
I am primarily referring to the vane style horizontal discharge diffusers you see in almost every office building, typically with an ordinary-temperature rated sprinkler in the center of an adjacent tile, only 1 ft. away.
Referencing NFPA 13, 2019 Edition, A.18.104.22.168: A diffuser in ceiling sheathing labeled by the manufacturer as "horizontal discharge" has directional vanes to move air further along the ceiling, and sprinklers located within the 2 ft. 6 in. (750 mm) radius should have an intermediate-temperature rating.
Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
Subscribe and learn something new each day:
Top August '23 Contributors
Get 100 Days of Free Sample Questions right to you!
PE PREP SERIES