To keep them in a safe condition, all gas appliances should be regularly checked and maintained by a competent person who is Gas Safe registered. Although not a substitute for having your appliances serviced and checked regularly, additional protection can be obtained by the installation of carbon monoxide alarms, especially where open-flued or flueless gas appliances are installed.

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In England and Wales, the Building Regulations require a carbon monoxide alarm to be fitted when a new solid fuel (wood or coal burning) appliance is installed. It is not currently mandatory for gas appliances but it is, however, strongly recommended as a second line of defence against carbon monoxide poisoning.