e Un inches (0.1m) along the ceiling from the comer and 4 e Z™~ Bedroom | Hal | Dining | Mithen | Bedroom Bedroom Ww oom ° — @ e + et Urlag Reersation inches (0.1m) down the wall as shown in the illustration. Heat or smoke detectors should not be placed in this ‘dead’ air space. Badroom le @ ledcaws raquisd Smoks Pence @ lectcaws an optond Smoke Dawei door ss notprowded between fing and recraazanal roars. Ceiling-mounted smoke alarms should be located in the center of the room or hall, not less than 4 inches from any wall. When the detector is mounted on a wall, the top of the detector should be 4 to 12 inches from the ceiling.
Smoke detectors should not be mounted where the normal ambient temperatures are above 100°F (37.8°C) lng —4 In. {0.1m} MlaLOL oo} LLLLis. Acceptable Here ei Heat from a fire rises to the ceiling, spreads out across the ceiling surface and begins to bank down from the E Ge Never Here or below 40°F (4°C) or in front of air conditioners, heating registers, or other locations where normal air circulation will keep smoke from entering the detector. ; Top of Detector Acceptable Here U; ZF 15 ! ys vo. = | Note: ehmeasurements are tothe closest ceiling. The corner where the ceiling and wall meet is s L ‘ ‘ (3: re 4 fg —— an air space into which heat has difficulty penetrating.
In most fires, the ‘dead’ air space measures about 4 Refer to instructions provided with the detector for further installation requirements.