A water heater can provide essential comfort, but a fuel-burning unit may also produce carbon monoxide if combustion is incomplete or ventilation is inadequate. Since this gas is colourless and odourless, recognising its presence without a reliable alarm is difficult. Installing a carbon monoxide detector for water heater safety can help alert occupants when dangerous levels of carbon monoxide are detected.

The best placement depends on the manufacturer's instructions, the detector's specifications and local safety requirements. Follow the recommended installation distance from the water heater, and avoid locations where humidity, steam or poor airflow could affect the device's performance. Test the alarm regularly, replace batteries as required and check the unit's expiry date.

A detector is an important warning system, but it cannot replace routine water heater maintenance, proper ventilation or professional inspections. If the alarm sounds, move everyone outdoors into fresh air and contact emergency services from a safe location. Never ignore symptoms such as dizziness, headache or nausea.