First Alert Ionization Smoke Alarm Kidde Smoke Detector First Alert Hardwired Smoke and Carbon Monoxide Detector We’ve all been there. It’s 2 a.m. and you hear an eardrum-piercing beep.

“This First Alert hardwired smoke detector is equipped with an ionization sensor to reliably detect smoke from fast-flaming fires and alerts you with an 85-decibel alarm,” Shaunfield says.

First Alert Ionization Smoke Alarm Kidde Smoke Detector First Alert Hardwired Smoke and Carbon Monoxide Detector We’ve all been there. It’s 2 a.m. and you hear an eardrum-piercing beep.

First Alert Ionization Smoke Alarm Kidde Smoke Detector First Alert Hardwired Smoke and Carbon Monoxide Detector We’ve all been there. It’s 2 a.m. and you hear an eardrum-piercing beep.

First Alert Ionization Smoke Alarm Kidde Smoke Detector First Alert Hardwired Smoke and Carbon Monoxide Detector We’ve all been there. It’s 2 a.m. and you hear an eardrum-piercing beep.

“Ionization smoke alarms in particular can be susceptible to this, as they will sense humidity in a similar style of sensing smoke,” says Park. Near heating and air-conditioning vents.

First Alert Ionization Smoke Alarm Kidde Smoke Detector First Alert Hardwired Smoke and Carbon Monoxide Detector We’ve all been there. It’s 2 a.m. and you hear an eardrum-piercing beep.