DIFF Subgroup
F24H 1/18 Water-storage heaters
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters > Water-storage heaters
CPC:
Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters (steam boilers F22B) > Water-storage heaters
CPC subdivides this area 6x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
Child Classifications
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- F24H 1/20 with immersed heating elements, e.g. electric elements or furnace tubes +3 CPC IPC+CPC Available in IPC and CPC