This standard specifies the terms and definitions, requirements, test methods and other performance and structural requirements for household gas instant water heaters with preheating function. This standard applies to household gas instant water heaters with a preheating function (hereinafter referred to as "water heaters") with a thermal load of no more than 70kW.
T/CNHA 1053-2023 history
2023T/CNHA 1053-2023 Domestic gas instantaneous water heater Special requirement with pre-heating function