Where should a smoke detector be placed on a tray (coffered) ceiling?

Friday, December 4, 2020

A smoke alarm should be placed on the highest part of a tray-shaped (coffered) ceiling, or on the sloped part within 12 inches of the highest point, according to the National Fire Protection Association [NFPA 72, 29.11.3.4(12), 2019 edition]. 

    Smoke rises first to the highest point of a ceiling, then moves downward as it accumulates. So a location on the lower ceiling level, like in the photo above, will take longer to respond to a fire. 

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Here’s links to a some of our other blog posts about SMOKE AND CO ALARMS:

• How close can a smoke detector be to a ceiling fan? 

• How close can a smoke detector be to an air conditioning/heating supply register (vent)? 

• How close can a smoke detector be to a bathroom door?

Should a smoke alarm be installed in the kitchen? 

Where are smoke alarms required to be located? 

Are carbon monoxide alarms required to be installed in homes in Florida?

When should I replace my smoke alarms? 

Does the Nest Protect system meet current building code standards for a combination smoke and carbon monoxide alarm system? 

What is the best place to install carbon monoxide alarms (CO detectors) in a house? 

Can the smoke sensors in a home security/fire alarm system replace the smoke alarms required by the building code?

What does the new Florida smoke alarm law require? 

 Is there a Florida law that all older homes must have smoke alarms, regardless of when they were built? 

• Why are carbon monoxide (CO) alarms required by law for homes in Florida? 

• When were smoke alarms first required to be interconnected?

How can I tell the difference between a smoke detector and carbon monoxide (CO) detector? 

When were smoke detectors/alarms first required in Florida?

What is the minimum height for placement of a CO alarm (carbon monoxide detector)? 

Where does the code require CO alarms (carbon monoxide detectors)?  

• Is it illegal to disconnect a smoke alarm? 

• Where should smoke alarms NOT be installed?

• Does a home inspector test smoke alarms?

 Does a home inspector test CO carbon monoxide alarms?

• Why does my CO alarm (carbon monoxide) keep chirping after replacing the battery?  

 What is the average life expectancy of a CO carbon monoxide detector?

• What is the average life expectancy of a combination smoke and CO carbon monoxide detector? 

    Visit our SAFETY page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

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