According to the type of gas used, it is divided into: artificial gas water heater, natural gas water heater, liquefied petroleum gas water heater;
According to the control method, it can be divided into: front-system water heater and rear-system water heater;
According to the way of supply and exhaust, it is divided into: straight exhaust type, flue type, forced exhaust type, balanced type, condensing type;
According to the installation location, it can be divided into: indoor installation and outdoor installation.
Due to China's actual conditions and usage habits, gas water heaters are still the first choice of many consumers. The safety of gas water heaters is also the most concerned issue. The country prohibits the production and sale of direct-discharge gas water heaters. Whether the toxic gas can be discharged in time has become the key to the safety of gas water heaters. Judging from the development of European and American countries, the forced exhaust type is an inevitable trend in the development of gas water heaters.
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