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IPC Class
F24

HEATING; RANGES; VENTILATING

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
HEATING; RANGES; VENTILATING

Description

Class F24 covers heating systems, cooking ranges, and ventilation equipment. This includes furnaces, boilers, heat exchangers, space heating devices, cooking appliances, and air circulation/extraction systems for buildings and industrial applications. The classification encompasses both the equipment design and associated control mechanisms for thermal management and air handling in residential, commercial, and industrial settings. Related mechanical engineering aspects such as combustion, heat transfer, and air flow regulation fall within this broad category.

Filing statistics

IPC F24 recorded 869,661 patent applications worldwide between 2013 and 2023, summed across its 9 subclasses. Annual filings grew from 48,917 in 2013 to 89,695 in 2023 (+83%), peaking at 105,033 applications in 2020. The most active applicants in class F24 are MIDEA (21,834 applications), GREE ELECTRIC APPLIANCES (21,535 applications) and GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY (20,870 applications).

Source: EPO PATSTAT, worldwide filings

In class comparison

F24 comprises 9 subclasses with filings; the largest is F24F with 49.1% of the class's 869,661 applications between 2013 and 2023.

Subclasses of class F24 by patent applications, 2013–2023
RankSubclassTitleApplicationsShare
1F24F, Air-Conditioning; Air-Humidification; Ventilation; Use of Air Currents for ScreeningAir-Conditioning; Air-Humidification; Ventilation; Use of Air Currents for Screening427,11349.1%
2F24H, Fluid Heaters, e.g. Water or Air Heaters, Having Heat-Generating Means, e.g. Heat Pumps, in GeneralFluid Heaters, e.g. Water or Air Heaters, Having Heat-Generating Means, e.g. Heat Pumps, in General123,80114.2%
3F24C, Domestic Stoves or Ranges; Details of Domestic Stoves or Ranges, of General ApplicationDomestic Stoves or Ranges; Details of Domestic Stoves or Ranges, of General Application116,00713.3%
4F24D, Domestic- or Space-Heating Systems, e.g. Central Heating Systems; Domestic Hot-Water Supply Systems; Elements or Components ThereforDomestic- or Space-Heating Systems, e.g. Central Heating Systems; Domestic Hot-Water Supply Systems; Elements or Components Therefor88,43410.2%
5F24S, Solar Heat Collectors; Solar Heat SystemsSolar Heat Collectors; Solar Heat Systems72,0758.3%
6F24J21,1252.4%
7F24B, Domestic Stoves or Ranges for Solid Fuels; Implements for Use in Connection With Stoves or RangesDomestic Stoves or Ranges for Solid Fuels; Implements for Use in Connection With Stoves or Ranges12,5661.4%
8F24T, Geothermal Collectors; Geothermal SystemsGeothermal Collectors; Geothermal Systems6,2750.7%
9F24V, Collection, Production or Use of Heat Not Otherwise Provided forCollection, Production or Use of Heat Not Otherwise Provided for2,2650.3%

Source: EPO PATSTAT, worldwide filings

Related Keywords

HEATINGelectric RANGE(S)STOVES

8 direct subcodes

Child Classifications

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Top Applicants

Top 10 applicants by patent filings, 2013–2023, worldwide · Source: EPO PATSTAT

  1. MIDEA 21,834
  2. GREE ELECTRIC APPLIANCES 21,535
  3. GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY 20,870
  4. QINGDAO HAIER AIR CONDITIONER COMPANY 15,443
  5. HAIER SMART HOME 15,442
  6. QINGDAO HAIER AIR CONDITIONER ELECTRIC COMPANY 10,008
  7. AUX AIR CONDITIONING COMPANY 7,723
  8. NINGBO AUX ELECTRIC COMPANY 7,499
  9. NINGBO FOTILE KITCHENWARE COMPANY 6,712
  10. LG ELECTRONICS KR 6,441