Descriptors | Temperature measurement, Efficiency, Burners, Instantaneous water heaters, Hot-water supply systems, Marking, Fitness for purpose, Pressure testing, Temperature-rise limit, Type testing, Forced-draught burners, Safety measures, Heating equipment, Storage water heaters, Boilers, Instructions for use, Temperature, Hot-water boilers, Testing conditions, Performance testing, Domestic, Mathematical calculations, Water heaters |