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The prevention of carbon monoxide poisoning is one of the most important duties of firefighters. In order to complete this task, fire departments of cities have increased the home visit service of gas-operated geyser by every winter for recent years. Although firemen have been dedicating to visit houses by houses and guide people to be aware of the carbon monoxide poisoning, deadly cases still happen a lot. By analyzing the statistic data of recent years, the cause of carbon monoxide poisoning cases is mostly from the gas-operated geyser which is wrongly istalled indoors or at raletively airtight space, like baconies with bad ventilation (ex. hanging clothes or illegal buildings). Therefore, It’s necessary to study how to improve the prevention of carbon monoxide poisoning. While firemen of the responsible area visit houses and instruct some guideline of preventing carbon monoxide poisoning, they will suggest the resident, who lives with the potential causes of carbon monoxide poisoning, to move the gas-operated geyser or to replace it by a new model. Within the period of Fire Department subsidizing, which is from January to April, people tend to agree to move or to replace the gas-operated geyser. Relatively, people tend to remain original rather than changing while the period without subsidizing, which is from May to December, that causes an ineffective result of preventing carbon monoxide poisoning. So it is necessary to come up with some plan to improve the willing of people to be aware of the potential causes of carbon monoxide poisoning, and the willing to correct immediately. This study, consults with the home-visiting experience of firemen from different organizational level, expects to find the best way through Analytic Hierarchy Process(AHP) to prevent carbon monoxide poisoning. This study finds the most important factor of choosing a way to prevent carbon monoxide poisoning is cost, followed by safety, time, human resources and diversity. Considering these factors, preferential offers by gas-operated geyser manufacturers, replacement of old geyser and legislative punishment is the best solution. This study may contribute to the enhancement of preventing carbon monoxide poisoning in the future. Keywords:Home visits, Gas heater, Prevent carbon monoxide poisoning, Analytic Hierarchy Process
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