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Central heating systems
  • F24D1/00
    		•  Steam central heating systems (district heating systems F24D 10/00; central heating systems using heat accumulated in storage masses F24D 11/00) [1, 2006.01, 2022.01] HB CC 3L070
  • F24D3/00
    		•  Hot-water central heating systems (district heating systems F24D 10/00; central heating systems using heat accumulated in storage masses F24D 11/00) [1, 2006.01, 2022.01] HB CC 3L070
  • F24D5/00
    		•  Hot-air central heating systems (district heating systems F24D 10/00; central heating systems using heat accumulated in storage masses F24D 11/00; air conditioning F24F); Exhaust-gas central heating systems [1, 2006.01, 2022.01] HB CC 3L071
  • F24D7/00
    		•  Central heating systems employing heat-transfer fluids not covered by groups F24D 1/00-F24D 5/00, e.g. oil,salt or gas (district heating systems F24D 10/00;central heating systems using heat accumulated in storage masses F24D 11/00) [1, 2006.01, 2022.01] HB CC 3L071
  • F24D9/00
    		•  Central heating systems employing combinations of heat-transfer fluids covered by two or more of groups F24D 1/00-F24D 7/00 (district heating systems F24D 10/00; central heating systems using heat accumulated in storage masses F24D 11/00) [1, 2006.01, 2022.01] HB CC 3L071
  • F24D10/00
    		•  District heating systems [5, 2006.01, 2022.01] HB CC 3L071
  • F24D11/00
    		•  Central heating systems using heat accumulated in storage masses (self-contained storage heating units F24D 15/02) [1, 2006.01, 2022.01] HB CC 3L071
  • F24D12/00
    		•  Other central heating systems HB CC 3L071
    Other domestic- or space-heating systems
  • F24D13/00
    		•  Other domestic- or space-heating systems HB CC 3L072
  • F24D15/00
    		•  Other domestic- or space-heating systems [1, 2006.01, 2022.01] HB CC 3L072
  • F24D17/00
    		•  Domestic hot-water supply systems [1, 2006.01, 2022.01] HB CC 3L073
  • F24D18/00
    		•  Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply [2022.01] HB CC 3L122
  • F24D19/00
    		•  Details (of water or air heaters F24H 9/00; of heat-exchange or heat-transfer apparatus, of general application F28F) [3] HB CC 3L073
    Indexing scheme associated with group F24D 18/00, relating to electric generators, thermal aspects and constructional aspects of small-scale combined heat and power [CHP] systems[2022.01]
  • F24D101:00
    		•  Electric generators of small-scale CHP systems [2022.01] HB CC
  • F24D103:00
    		•  Thermal aspects of small-scale CHP systems [2022.01] HB CC
  • F24D105:00
    		•  Constructional aspects of small-scale CHP systems [2022.01] HB CC
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