HETAS Co Alarm Positioning Guide
Carbon Monoxide (CO) is an extremely poisonous gas that can be present in the fumes from improperly combusted fuels. Fuels such as gas, oil, solid mineral fuel, and biomass all have the potential to emit CO. Since the gas cannot be seen, smelled, or tasted, it is difficult to detect.
Below is a diagram to help illustrate the ideal placement of CO alarms in your home:

For more information please read our 'Everything to know about Carbon Monoxide alarms' blog or visit the HETAS Advice Hub.