A carbon monoxide detector is an inexpensive, effective way to protect your family from a serious hidden household danger. Carbon monoxide (CO) is a deadly, odorless gas that forms in fumes when fuels like wood, charcoal, gasoline and propane, burn incompletely. When inhaled, CO prevents the blood from carrying oxygen to the brain and other vital organs, leading to poisoning and death. The International Association of Fire Chiefs recommends a CO detector be located within 10 feet of every bedroom door, as well as in and near any attached garage.

Unlike a smoke alarm, which may sound for no reason at all, the CO detector will only sound when dangerous levels are detected. There are several different types of CO detectors available, ranging from basic battery-powered models to fancier ones that talk, connect to a wireless network and work in conjunction with a smoke alarm. All meet performance standards set and enforced by Underwriters Laboratories.

When a CO alarm sounds, you should immediately move to fresh air and call the fire department. Symptoms of CO poisoning include headache, fatigue, dizziness, nausea, bright red skin and mental confusion. Once outside, check to make sure all household members are accounted for and that there isn’t an unattended gas leak.

If the alarm does not stop beeping, it is a good idea to take everyone to a neighbor’s home for fresh air and seek medical attention as soon as possible. If the CO level is found to be above 400 parts per million, a fire department official should visit the scene to evaluate the situation and determine if it is safe to reenter the house.

A carbon monoxide alarm detector weighs the same as a typical smoke detector and can be placed on a ceiling or a wall. It is best to install it in a hallway, about 10 feet from each bedroom and close to the kitchen. It should not be placed next to a furnace, stove or other combustion appliance.

Most detectors will sound an alarm when they reach their peak level of exposure, which is usually determined by a sensor that has been designed to mimic the uptake of carbon monoxide in the human body. This helps reduce false alarms that can occur in other situations, such as cigarette smoke or other short bursts of CO.

The life of a CO detector can vary greatly depending on the model and manufacturer, but most will last from five to seven years. It is a good idea to replace the unit when it has reached this point. Most detectors have an expiration date printed on the unit or its housing, and some even have internal backup batteries. Some detectors can be recycled at electronics recycling facilities, while others are considered hazardous waste and must be disposed of properly. See your owner’s manual for specific instructions on resetting and replacing your CO detector.