DIFF Subgroup
F24D 11/02 using heat pumps
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Central heating systems using heat accumulated in storage masses > using heat pumps
CPC:
Central heating systems using heat accumulated in storage masses (self-contained storage heating units F24D15/02) > using heat pumps
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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