Smoke detectors should be installed inside each bedroom, outside each sleeping area and on every level of a house, according to the U.S. Fire Administration. Exact placement also depends on the home’s layout, the manufacturer’s instructions and any requirements that apply locally.
Most homes use self-contained smoke alarms, which are often called smoke detectors.
Bedrooms, Sleeping Areas and Every Level
The U.S. Fire Administration recommends putting smoke alarms inside and outside each bedroom and sleeping area and on every level of the home. Alarms near sleeping areas are intended to help wake people who are asleep when a fire starts.
Hallways outside bedrooms, basements, main living levels and finished attic spaces are common locations. Larger homes and long hallways may need additional alarms so every area is covered.
Split-level and multi-story homes often need careful planning, since stairways and open areas can affect how smoke travels between levels.
The USFA also recommends interconnected smoke alarms so that when one sounds, they all sound. That helps people hear an alarm even when the fire starts far from where they are sleeping.
Manufacturer Guidance and Avoiding Nuisance Alarms
Manufacturer instructions give specific guidance on mounting height, distance from walls and ceiling peaks, and spacing. Follow them for the alarm models in your home. Ceiling-mounted alarms and wall-mounted alarms have different placement guidance, and sloped or vaulted ceilings have their own considerations.
Placement also affects nuisance alarms. Cooking smoke and steam from showers can trigger alarms placed too close to kitchens and bathrooms. Drafts from windows, vents and fans can affect how smoke reaches an alarm. Manufacturer instructions usually describe locations to avoid.
Smoke Alarms Versus Carbon Monoxide Alarms
Smoke alarms detect smoke, not carbon monoxide. Homes with fuel-burning appliances, fireplaces or attached garages may also need carbon monoxide alarms, which have their own placement guidance. Combination smoke and CO alarms are available, but they still need to be placed according to their instructions. The USFA also recommends dual-sensor alarms or a mix of ionization and photoelectric alarms, since different fires produce smoke differently.
Local Requirements and Professional Installation
The USFA notes that your city, county or state may require a specific type of alarm, and requirements can differ for new construction, remodels and existing homes. Check with your local fire department or building authority in Utah for the rules that apply to your property.
Hardwired alarms connect to household wiring, and the USFA notes that only qualified electricians should install them. An electrician can also add interconnection and confirm that each alarm is placed and connected correctly. Testing every alarm after installation confirms that interconnected units sound together.
If you are adding or relocating alarms in your Salt Lake City home, our professional smoke detector installation can help place and connect them where they will do the most good.