False alarms may be caused by placing devices where they will not operate properly. To avoid false alarms, DO NOT locate smoke alarms and carbon monoxide alarms:
• In damp or very humid areas, or next to bathrooms with showers. The moisture in humid air can enter the sensing chamber as water vapor, then cool and condense into droplets that cause a false alarm. Install smoke alarms at least 10 feet (3 meters) away from bathrooms.
• In very dusty or dirty areas. Dust and dirt can build up on the smoke alarm’s sensing chamber and can make it overly sensitive, or block openings to the sensing chamber and keep the device from sensing smoke.
• Near fresh air inlets, returns or excessively drafty areas. Air conditioners, heaters, fans, fresh air intakes and returns can drive smoke away from smoke alarms, making the devices less effective.
• In dead air spaces at the top of a peaked roof or in the corners between ceilings and walls. Dead air may prevent smoke from reaching a smoke alarm.
• In insect-infested areas. If insects enter a smoke alarm’s sensing chamber, they may cause a false alarm. Get rid of the bugs before installing smoke alarms where bugs are a problem.
• Near fluorescent light fixtures. Electrical “noise” from nearby fluorescent light fixtures may cause a false alarm. Install smoke alarms and fluorescent lights on separate electrical circuits.
• Within 10 feet (3 meters) of any cooking appliance.
NOTE: Smoke alarms are not to be used with smoke alarm guards unless the combination has been evaluated and found suitable for that purpose.
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