This week we will deal with the locations again, this time it’s for when we place smoke alarms near a ceiling fan, and/or a forced air supply registers.(A/C or Heat)
29.8.3.4 Specific Location Requirements
(7) Smoke alarms and smoke detectors shall not be installed within a 914mm (36 in.) horizontal path from the supply registers of a forced air heating or cooling system and shall be installed outside of the direct airflow from those registers.
(8) Smoke alarms and smoke detectors shall not be installed within a 914 mm (36 in.) horizontal path from the tip of the blade of a ceiling-suspended (paddle) fan.
So if you have a 52” fan then you will need to be 62” away from the box in the ceiling for the fan in order to pass the rough inspection.
Till next time work safe be safe
Jake.