False Alarm
Don't place smoke detectors/alarms in kitchens, bathrooms, furnace rooms, workshops, garages, or in other spaces where temperatures can fall below 32°F, or exceed 100°F. These areas are subject to fumes, steam, dust and smoke, which can generate false alarms and contaminate the alarm.
Delay Alarm
Don't install alarms where air movement can delay the alarm. This means they should be away from windows and at least 3 feet from warm or cold air ducts or return ducts. Also, don't install them between an air return and a bedroom door. Smoke alarms should not be located within 3 feet of doors to a kitchen or bathroom with tub or shower.
Installation Tips
- Don't place alarms where it is inconvenient or unsafe to test them, like in tall foyers or high over a stairway.
- If smoke alarms are placed in a room with sloped ceilings, the alarm should be located on the high side of the ceiling.
- A smoke alarm installed in a stairwell must be located in such a way that smoke rising in the stairwell cannot be prevented from reaching the alarm by an intervening door or obstruction.
- A smoke alarm installed to detect a fire in the basement must be located close to the stairway leading to the floor above.