IPC Classification

Class code (prefix) Descriptions Number of results
F24D 1/00 Steam central heating systems
F24D 1/02 Steam central heating systems operating with live steam
F24D 1/04 Steam central heating systems operating with exhaust steam
F24D 1/06 Steam central heating systems operating with superheated steam
F24D 1/08 Feed-line arrangements, e.g. providing for one-pipe system
F24D 3/00 Hot-water central heating systems
F24D 3/02 Hot-water central heating systems with forced circulation, e.g. by pumps
F24D 3/04 Hot-water central heating systems with the water under high pressure
F24D 3/06 Arrangements or devices for maintaining high pressure
F24D 3/08 Hot-water central heating systems in combination with systems for domestic hot-water supply
F24D 3/10 Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
F24D 3/12 Tube and panel arrangements for ceiling, wall, or underfloor heating
F24D 3/14 Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
F24D 3/16 Tube and panel arrangements for ceiling, wall, or underfloor heating mounted on, or adjacent to, a ceiling, wall or floor
F24D 3/18 Hot-water central heating systems using heat pumps
F24D 5/00 Hot-air central heating systems; Exhaust-gas central heating systems
F24D 5/02 Hot-air central heating systems; Exhaust-gas central heating systems operating with discharge of hot air into the space or area to be heated
F24D 5/04 Hot-air central heating systems; Exhaust-gas central heating systems operating with discharge of hot air into the space or area to be heated with return of the air to the air heater
F24D 5/06 Hot-air central heating systems; Exhaust-gas central heating systems operating without discharge of hot air into the space or area to be heated
F24D 5/08 Hot-air central heating systems; Exhaust-gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through radiators
F24D 5/10 Hot-air central heating systems; Exhaust-gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through heat-exchange ducts in the walls, floor, or ceiling
F24D 5/12 Hot-air central heating systems; Exhaust-gas central heating systems using heat pumps
F24D 7/00 Central heating systems employing heat-transfer fluids not covered by groups , e.g. oil, salt or gas
F24D 9/00 Central heating systems employing combinations of heat-transfer fluids covered by two or more of groups
F24D 9/02 Hot water and steam systems
F24D 10/00 District heating systems
F24D 11/00 Central heating systems using heat accumulated in storage masses
F24D 11/02 Central heating systems using heat accumulated in storage masses using heat pumps
F24D 12/00 Other central heating systems
F24D 12/02 Other central heating systems having more than one heat source
F24D 13/00 Electric heating systems
F24D 13/02 Electric heating systems solely using resistance heating, e.g. underfloor heating
F24D 13/04 Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
F24D 15/00 Other domestic- or space-heating systems
F24D 15/02 Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
F24D 15/04 Other domestic- or space-heating systems using heat pumps
F24D 17/00 Domestic hot-water supply systems
F24D 17/02 Domestic hot-water supply systems using heat pumps
F24D 18/00 Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply
F24D 19/00 DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR - Details
F24D 19/02 Arrangement of mountings or supports for radiators
F24D 19/04 Arrangement of mountings or supports for radiators in skirtings
F24D 19/06 Casings, cover lids or ornamental panels, for radiators
F24D 19/08 Arrangements for drainage, venting or aerating
F24D 19/10 Arrangement or mounting of control or safety devices
F24D 101/00 Electric generators of small-scale CHP systems
F24D 101/10 Gas turbines; Steam engines or steam turbines; Water turbines, e.g. located in water pipes
F24D 101/20 Wind turbines
F24D 101/30 Fuel cells
F24D 101/40 Photovoltaic [PV] modules
F24D 101/50 Thermophotovoltaic [TPV] modules
F24D 101/60 Thermoelectric generators, e.g. Peltier or Seebeck elements
F24D 101/70 Electric generators driven by internal combustion engines [ICE]
F24D 101/80 Electric generators driven by external combustion engines, e.g. Stirling engines
F24D 103/00 Thermal aspects of small-scale CHP systems
F24D 103/10 Small-scale CHP systems characterised by their heat recovery units
F24D 103/13 Small-scale CHP systems characterised by their heat recovery units characterised by their heat exchangers
F24D 103/17 Storage tanks
F24D 103/20 Additional heat sources for supporting thermal peak loads
F24D 105/00 Constructional aspects of small-scale CHP systems
F24D 105/10 Sound insulation