F24H 1/44

Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups [CPC: F24H1/24] - [CPC: F24H1/40]  {, e.g. boilers having a combination of features covered by [CPC: F24H1/24] - [CPC: F24H1/40]}