The Best Carbon Monoxide Detectors (Under $25) on Amazon in 2018

Carbon monoxide (CO) is a colorless, odorless gas that steals oxygen from vital organs.

It causes people to faint without warning and eventually, to suffocate. Hundreds of Americans die each year from unintentional carbon monoxide poisoning (often at home during the winter months).

That's why most states require landlords to install carbon monoxide detectors in each apartment they rent. (Ask your superintendent to install one if you live in an apartment and don't have one already). 

Some states also require homeowners to have a CO detector, but even if your state doesn't, a carbon monoxide detector can save you or your family's life.

Carbon monoxide detectors often look like smoke detectors. For most people, a simple CO detector will suffice. They're battery-operated, wall-mountable devices that indicate something is wrong by beeping or chirping. Some carbon monoxide detectors use WiFi to connect with a smart home system. That might sound like overkill, but the expense can be worth it for caregivers who monitor a loved one from afar.

Here are the best-reviewed carbon monoxide detectors selling for less than $25 on Amazon:


Kidde KN-COB-B-LP2 Carbon Monoxide Alarm

Avg. Price: $21 | Bargain Price: $12

Several Amazon customers called their gas company or fire department after this unit went off and discovered that a furnace or heater was leaking carbon monoxide. Some customers had difficulty mounting this unit to a wall, but most said it was easy to install.


Kidde KNCOB-DP2 Tamper Resistant Plug-In Carbon Monoxide Alarm with Battery Backup

Avg. Price: $25 | Bargain Price: $16

This unit is easy to install and operate, according to several Amazon customers. Dog owners may want to avoid this model; two reviewers say they had to return it because it drove their dogs crazy.


Nighthawk AC Plug-in Operated Carbon Monoxide Alarm with Digital Display KN-COPP-3

Avg. Price: $31 | Bargain Price: $25 (the price of this unit has been drifting downward)

Several Amazon customers say this CO detector saved their lives because it alerted them to a furnace or hot water heater that was leaking carbon monoxide. Some angry customers received an older unit that was nearing its expiration date, so be sure to check the unit’s born-on date (on any CO detector you buy). 

John DeFeo