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