with water mantle surrounding the combustion chamber or chambers

Full Title

Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters (steam boilers F22B) > Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating > with water mantle surrounding the combustion chamber or chambers

Child Classifications

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• F24H 1/26 the water mantle forming an integral body
• F24H 1/30 the water mantle being built up from sections