BRK First Alert SC9120B SMICO100- Combination Carbon Monoxide & Smoke Alarm 3 pack

Pack of 3  SC9120B SMICO100-AC Combination Carbon Monoxide & Smoke Alarm AC Power & Battery Description The BRK hardwire combination smoke and carbon monoxide alarm detects two hazards with one simple unit. Carbon monoxide (CO) is a colorless, odorless, deadly gas. It can be emitted by sources including gas or oil furnaces, gas clothes dryers, water heaters, fireplaces, wood stoves, charcoal grills, gas ranges, and space heaters. A clogged chimney, improper venting, and attached garages can also cause carbon monoxide accumulation. According to the Consumer Product Safety Commission (CPSC), at least one CO alarm should be installed near a home's sleeping area.