DIFF Subgroup
F24D 3/122 Full Title
Hot-water central heating systems (district heating systems F24D10/00; central heating systems using heat accumulated in storage masses F24D11/00) > Tube and panel arrangements for ceiling, wall, or underfloor heating (electric underfloor heating F24D13/02)
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.