Heat and smoke rise, so all alarms should be installed high on a wall or on the ceiling. Install alarms on every level of your home. The National Fire Protection Agency recommends that you sleep with bedroom doors closed to slow the spread of smoke and fumes if there is a fire. Sometimes small children don't wake up to the sound of smoke alarms. Test the alarm outside children's bedrooms while the children are asleep to check their response. If people in your household sleep with doors closed, install interconnected alarms inside sleeping areas as well.
- Wall-mounted alarms should be installed so that the top of the alarm is 4 to 12 inches from the ceiling.
- Ceiling-mounted alarms should be placed 4 to 10 inches from any wall. If the ceiling is pitched, mount the unit at or near the highest point.
Do not install near a window, door, fireplace or forced-air register where drafts could detour smoke away from the unit.
Position basement alarms close to the bottom of the stairs. Don't place the unit at the top of the stairs; dead air trapped near the closed door could prevent smoke from reaching the unit.