Carbon monoxide (CO) is an odourless, colourless gas produced by incomplete combustion from gas boilers, open fires, wood burners, gas cookers, and any other fuel-burning appliance when the combustion process is impaired — typically due to inadequate ventilation or a fault in the appliance. In enclosed spaces, CO can reach dangerous concentrations very quickly. Around 40 people die from accidental CO poisoning in England and Wales each year, and thousands more require medical treatment.
Carbon monoxide alarms are the primary defence against CO poisoning in the home. Since October 2022, CO alarms have been required by law in any room in England and Wales that contains a gas, oil, or solid fuel combustion appliance (including boilers and open fires). The alarm must be in working order at the start of any new tenancy. For owner-occupiers, CO alarms are strongly recommended wherever there is a combustion appliance.
There are two main types of CO alarm: battery-operated and mains-wired. Battery-operated alarms are simpler to install and are the most common choice. Long-life sealed-battery alarms (with a 5–10 year battery life) are the preferred type as they eliminate the risk of the battery running flat unnoticed. Mains-wired CO alarms with battery backup are the most reliable option and can be interlinked with smoke alarms for whole-house coverage.
CO alarms should be positioned at head height — the gas is slightly lighter than air and rises — and not directly in the same room as the appliance. Do not position them next to windows, doors, or ventilation points. If the alarm sounds with a continuous beep, get everyone out of the building immediately and call 999. DP Power Solutions installs mains-wired CO alarms as part of any new smoke alarm installation.
About DP Power Solutions: We are qualified domestic electricians based in Staffordshire, providing EICRs, consumer unit upgrades, rewires, EV charger installation, and more across Cannock, Rugeley, Lichfield, Stafford, and the surrounding area.