NFPA 72 code sections · Case Studies & Incident Reviews
Hearing-impaired guest rooms: 110 candela at the bed, 177 near the ceiling
In sleeping rooms that require visible notification — accessible hotel rooms, dormitory rooms for deaf or hard-of-hearing residents — a wall or ceiling strobe must deliver far more light than a corridor appliance, because it has to wake someone through closed eyelids. The code requires 110 cd minimum when the strobe is mounted 24 inches or more below the ceiling, and 177 cd when it is within 24 inches of the ceiling, located within 16 feet of the pillow. A 15 cd corridor strobe moved into a guest room is a classic incident-review finding.
NFPA 72 reference
Chapter 18 — Notification Appliances
18.5.5.7 Sleeping Areas (Table 18.5.5.7.1: 110 cd for appliances ≥ 24 in. below the ceiling, 177 cd for appliances < 24 in. from the ceiling; within 16 ft of the pillow)
References use NFPA 72 2019/2022 numbering — section numbers can shift between editions, so confirm in the edition your AHJ has adopted.
On the job
A hotel renovation installs 75 cd combination units in the accessible rooms because that's what the corridor uses. A fire marshal's post-incident review of a smoldering mattress fire finds the deaf guest in room 214 didn't wake. The 75 cd units are replaced with 177 cd ceiling strobes within 16 feet of the bed.
Quick check
1. A sleeping-room strobe mounted 30 in. below the ceiling must be at least:
2. A sleeping-room strobe within 24 in. of the ceiling must be at least:
3. The sleeping-room strobe must be located within what distance of the pillow?
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