Combination Smoke and Carbon Monoxide Alarm | Combo Detector

Shop the most trusted brand in fire safety to help protect your home & family.

Install on every level, every bedroom

2-in-1 combination smoke and carbon monoxide alarms detect both types of danger. First Alert offers 10-year sealed battery, battery and hardwired options with features like interconnect, so when one sounds all sound. Combo alarms can also include voice and location alerts and more to provide reliable detection.

FAQs

How often should I replace a combination smoke and carbon monoxide alarm?

Most combination smoke and carbon monoxide alarms should be replaced at least every 10 years. Check the manufacturer’s date on the back of the alarm and if it’s 10 years old or older, it’s time to replace.

What is a combination smoke and carbon monoxide alarm, and how does it work?

A combination 2-in-1 alarm detects both fire and carbon monoxide in a single device offering a convenient solution that also saves wall space. It uses sensors to monitor fire-related smoke particles and dangerous levels of carbon monoxide gas to alert you and provide an early warning to help you escape safely.

Where should I install combination smoke and CO alarms in my home?

How long do combination smoke and carbon monoxide alarms last?

These alarms need to be replaced at least every 10 years. Many models have built-in end-of-life indicators that alert you when it’s time to replace the unit. Regular testing can also help ensure your alarm is functioning properly and identify if the alarm needs to be replaced.

Can combination alarms be interconnected with other alarms in my home?

Yes, many combination alarms can be interconnected with other compatible smoke, CO, or combination units either wirelessly or wired depending on the model. This allows all alarms to sound at once if one detects a threat, enhancing whole-home detection —especially useful in large homes or multi-story layouts.