BS EN 12098-1. Controls for heating systems. Part 1. Control equipment for hot water heating systems. Modules M3-5, 6, 7, 8 Control systems, Heaters, Control technology, Heat engineering, Space-heating systems, Temperature-measuring instruments, Temperature controllers, Water heaters, Temperature control, Temperature, Probes, Accuracy, Electric contacts, Testing conditions, Test equipment, Marking, Technical documents, Documents, Instructions for use, Installation, Graphic symbols, Symbols, Communication media, Definitions, External