You can’t see it, taste it or smell it but it can kill quickly and with no warning.
Unsafe gas appliances produce a highly poisonous gas called carbon monoxide (CO). It can cause death as well as serious long-term health problems such as brain damage.
Remember the six main symptoms to look out for:
HeadachesDizzinessNauseaBreathlessnessCollapseLoss of consciousness
Being aware of [...]