Carbon Monoxide Detectors

Choose between plug-in, battery-powered, or hardwired units based on installation needs; look for detectors that use electrochemical sensors (most accurate for CO), have a clear digital readout and loud alarm, and meet local building codes or UL/CSA certification requirements

Install at least one detector on every level of the building, outside sleeping areas and near attached garages or fuel-burning appliances; place at least one in each bedroom area and on the main living level, and follow manufacturer placement guidelines for optimal detection

Key features include sensor type (electrochemical preferred), digital CO ppm display, end-of-life and low-battery alerts, mute/test button, battery backup for hardwired units, and a clear decibel rating for the alarm; optional features include Bluetooth or wired interconnectivity and data logging

Most CO detectors have an operational life of 5 to 10 years; test monthly, replace batteries per manufacturer recommendations (or annually for non-sealed models), clean vents gently with a vacuum, and replace the unit when it reaches its end-of-life indicator

Battery-only detectors are reliable when batteries are maintained and are suitable for many installations; hardwired detectors with battery backup offer continuous power and interconnect capability, which can be preferable for multi-unit or new-construction installations

Look for certification marks from recognized testing labs (e.g., UL or CSA) to ensure the detector meets safety and performance standards; certified units have been tested for sensitivity, alarm thresholds, and reliability

Immediately move everyone to fresh air outdoors or to an area with fresh air, call emergency services if anyone is symptomatic, ventilate the space if safe, and have a qualified technician inspect fuel-burning appliances and ventilation before re-entering for extended periods