Many appliances including gas fires, heaters, cookers and boilers are known as combustible
appliances. The carbon monoxide detector will constantly monitor carbon monoxide levels. Most have
two alarm levels. The first being an early warning before the levels become dangerous,
while the second full alarm sounds when a dangerous level has been reached.
See the Safety page about carbon monoxide for more details, including the symptoms of poisoning -
Carbon Monoxide Poisoning.
