F24H FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22)
Introduced: September 1968
Description
F24H encompasses fluid heating systems that generate heat through active means such as heat pumps, combustion, or electrical resistance to warm water, air, or other fluids for space heating, domestic hot water, and industrial applications. The subclass covers the overall design, integration, and operation of heater units combining heat sources with heat transfer mechanisms, including heat distribution networks and control systems. This classification excludes specific combustion chamber designs (covered in F23), dedicated heat exchanger elements (F28), and refrigeration cycles when classified outside heating contexts (F25). Related heating technologies employing passive solar collection or waste heat recovery are separately classified in their respective technology areas.
Title
Titles differ between systems:
IPC: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
CPC: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22)
Full Title
Full titles differ between systems:
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22)
Additional Content IPC
Limiting references
Steam generation
Application references
Arrangement or adaptation of heating devices specially for passenger or goods spaces of vehicles, the heat being derived otherwise than from the propulsion plant Air-heating in railway vehicles Air-heating in ships or other waterborne vessels Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, the air being heated Domestic- or space-heating systems; Domestic hot-water supply systems
Of 13 combined children, 8 exist in both systems.
5 codes are CPC-only extensions.
Note: 5 CPC extensions are marked as secondary classification only.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F24H 1/00 Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters (steam boilers F22B) +6 CPC IPC+CPC Available in IPC and CPC
- F24H 4/00 Fluid heaters characterised by the use of heat pumps since 1990 IPC+CPC Available in IPC and CPC
- F24H 7/00 Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release +3 CPC IPC+CPC Available in IPC and CPC
- F24H 8/00 Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation since 1990 +2 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F24,2013–2023, worldwide · Source: EPO PATSTAT
- MIDEA 21,834
- GREE ELECTRIC APPLIANCES 21,535
- GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY 20,870
- QINGDAO HAIER AIR CONDITIONER COMPANY 15,443
- HAIER SMART HOME 15,442
- QINGDAO HAIER AIR CONDITIONER ELECTRIC COMPANY 10,008
- AUX AIR CONDITIONING COMPANY 7,723
- NINGBO AUX ELECTRIC COMPANY 7,499
- NINGBO FOTILE KITCHENWARE COMPANY 6,712
- LG ELECTRONICS KR 6,441
Top Applicants (CPC)
Class F24,2013–2023, worldwide · Source: EPO PATSTAT
- GREE ELECTRIC APPLIANCES 11,167
- QINGDAO HAIER AIR CONDITIONER COMPANY 9,225
- HAIER SMART HOME 8,998
- MIDEA 8,874
- GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY 8,724
- LG ELECTRONICS KR 7,258
- MITSUBISHI ELECTRIC CORPORATION JP 7,009
- QINGDAO HAIER AIR CONDITIONER ELECTRIC COMPANY 6,104
- BSH (BOSCH UND SIEMENS HAUSGERAETE) DE 3,544
- NINGBO AUX ELECTRIC COMPANY 3,302