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Gas Instantaneous Water Heaters
Explanation of Terms


Information Provider The company/individual (specified person) who has submitted the specified information in respect of a product model under section 6 of Energy Efficiency (Labelling of Products) Ordinance, Cap 598.
Reference Number The number assigned to a product model by the Director of Electrical & Mechanical Services under section 8 of the Energy Efficiency (Labelling of Products) Ordinance, Cap 598.
Year The "Year" means the year in which the reference number is assigned or, where the energy efficiency grading is calculated in accordance with the new calculation method under section 12 of the Energy Efficiency (Labelling of Products) Ordinance, the year in which the new calculation method takes effect.
Brand The particular name used by a manufacturer or importer to identify a product range.
Model The particular name and/or number used by a manufacturer or importer to identify an individual product within a brand.
Energy Efficiency Grade (1 to 5) The energy efficiency grade calculated in accordance with the latest edition of Code of Practice on Energy Labelling of Products. Grade 1 being the most efficient and Grade 5 being the least efficient.
Gas Type The type of gas burnt by a gas instantaneous water heater of the model.
Thermal Efficiency (%) at 100% Load Condition Means thermal efficiency is calculated by computing the ratio of the heat generated at a given time to the measured heat input at 100% load condition, determined in accordance with the Code.
Thermal Efficiency (%) at 50% Load Condition Means thermal efficiency is calculated by computing the ratio of the heat generated at a given time to the measured heat input at 50% load condition, determined in accordance with the Code.
Rated Heat Input (kW) Means the heat input of the product as determined and declared by the manufacturer or importer of the product in accordance with the standard and requirements specified in the Code.
Measured Heat Input (kW) Means the heat input of the heater measured in accordance with the standard and requirements specified in the Code.
Place of Manufacture The place/country in which the storage type electric water heaters is manufactured.
Product being Supplied by Information Provider Whether the Information Provider still supplies the product model in Hong Kong. “Yes” will be specified unless the Information Provider has notified the Electrical & Mechanical Services Department that he no longer supplies the model in Hong Kong. For up-to-date availability, please contact the respective Information Provider for further information.
Supply Information Last Updated Date The date on which the Information Provider notified the Electrical & Mechanical Services Department on whether he still supplies the product model in Hong Kong.