Called "the silent killer," odorless, tasteless carbon monoxide (CO) gas results from faulty combustion in a furnace, fireplace or gas range, or a car (in an garage). A CO detector is your only means of protection.
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Step1
Shop for a CO detector. There are only three types; they're all affordable ($30 to $50) and easy to install:
Step2
A biometric CO detector has a gel cell of synthetic hemoglobin that absorbs CO. The combination battery and sensor module must be replaced every two to three years, but the detector should last about 10 years. After an alarm, the sensor should clear itself within 2 to 48 hours when left in fresh air. If it is not cleared, it will sound again when put back in the detector. Sensors that don't clear must be replaced.
Step3
A semiconductor detector is a plug-in device with an electronic sensor, and lasts from 5 to 10 years.
Step4
An electrochemical detector responds differently to different levels of CO exposure. Its self-powered battery doesn't need to be replaced, and the detector will last for at least five years.
Step5
Look for the Peak CO Memory feature on higher-end models. These displays remember the highest level of CO registered over a given time, which helps emergency personnel determine the severity of the problem, and can tell you if the detector sensed high CO levels while you were away.
Step6
Buy a detector with special light features if someone in your family is hard of hearing. During an alarm, an indicator light flashes as the horn sounds. Although many alarms have a liquid crystal display (LCD), it's easier to read a light-emitting diode (LED) display in dim light.
Step7
Listen for a continuous siren that indicates a full alarm. A repetition of loud pulsating beeps means there is some CO buildup; a chirp every minute alerts you to an alarm or battery problem.
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