The mechanism of gas poisoning, the cause analysis of gas poisoning due to water heater faults and its preventive measures are discussed.

Signs posted along the hallway walls tell people to be alert to possible gas poisoning and to be watchful of electric blankets and other fire hazards.

At the same time, they issued smoke, inflamer produce a great lot of smother, so in fires, majority people got gas poisoning and asphyxiate and died.