1, gas flow: 15 The gas flow of the exhaust water heater is greater than that of the exhaust water heater, which means that more power can be provided to heat the cold water to the required temperature more quickly.

2. Safety: 15 waste gas water heater adopts automatic flameout device and overheating protection device, which improves safety, while 8 waste gas water heater does not adopt this function because of its low power.