Radiators and convectors. Test methods and rating|Thermal output, Measurement, Laboratory testing, Measuring instruments, Dimensions, Pressure testing, Temperature, Aluminium alloys, Cast-iron, Reports, Equations, Convection heaters, Performance, Type testing, Test equipment, Steels, Accuracy, Space-heating systems, Definitions, Reproducibility, Steam central heating, Symbols, Performance testing, Leak tests, Radiators, Heaters, Central heating, Hot-water central heating, Sampling methods