F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING; HEATING
 F24
HEATING; RANGES; VENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
 F24

Note(s)

In this class, the following terms are used with the meanings indicated:

  • "stove" includes apparatus which may have an open fire, e.g. fireplace;
  • "range" means an apparatus for cooking having elements that perform different cooking operations or cooking and heating operations.

 F24B
DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES  [6]

 F24C
OTHER DOMESTIC STOVES OR RANGES; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION (radiator stoves of the fluid-circulating type F24H)
 F24C
Subclass index
STOVES OR RANGES, NOT RESTRICTED TO SOLID FUEL
General characteristics 1/00
With single kind of fuel or energy supply 3/00 - 9/00
With more than one, or unspecified kind of fuel or energy supply 1/00
With additional means for heating water 13/00
With self-cleaning provisions 14/00
Combinations of stoves or ranges 11/00
DETAILS OF STOVES OR RANGES IN GENERAL 15/00

 F24D
DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR (preventing corrosion C23F; water supply in general E03; using steam or condensate extracted or exhausted from steam engine plants for heating purposes F01K 17/02; steam traps F16T; domestic stoves or ranges F24B, F24C; water or air heaters having heat generating means F24H; combined heating and refrigeration systems F25B; heat exchange apparatus or elements F28; removing furring F28G)
 F24D

Note(s)

In this subclass, the following expression is used with the meaning indicated:

  • "central heating system" means a system in which heat is generated or stored at central sources and is distributed by means of a transfer fluid to the spaces or areas to be heated.  [5]

 F24D
Subclass index
CENTRAL HEATING SYSTEMS
With heat-transfer fluid: steam; hot water; hot air or exhaust gas; other fluid 1/00; 3/00; 5/00; 7/00
Combinations 9/00
District heating systems 10/00
By heat storage 11/00
Other systems 12/00
OTHER DOMESTIC- OR SPACE-HEATING SYSTEMS
Electric; Other 13/00; 15/00
DOMESTIC HOT-WATER SUPPLY 17/00
DETAILS 19/00

 F24F
AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (devices for ventilating greenhouses A01G; animal husbandry A01K, e.g. controlling humidity in incubators A01K 41/04; disinfecting or sterilising of air A61L; devices for reconditioning breathing air in sealed rooms or for ventilating gasproof shelters A62B; filtering, washing or drying of gases B01D; mixing gases with vapours or liquids in general B01F 3/00; spraying B05B, B05D; removing dirt or fumes from areas where they are produced B08B 15/00; ventilation, air-conditioning, or cooling, specially adapted for vehicles, see the relevant vehicle places, e.g. B60H, B61D 27/00; production of ozone C01B 13/10; chimneys or flues E04F 17/02, E04H 12/28, F23J 11/00, F23L 17/02; air ducts or conduits E04F 17/04, F16L; ventilation in doors or windows E06B 7/02; fans, blowers F04; noise-absorbing in pipes or pipe systems F16L; tops for chimneys or ventilating shafts F23L; cooling F25; details of heat-exchange or heat-transfer apparatus, of general application F28F; apparatus for generating ions to be introduced into non-enclosed gases, e.g. the atmosphere, H01T 23/00)
 F24F

Note(s)

  1. In this subclass:
  2. In this subclass, the following terms or expressions are used with the meanings indicated:
    • "air-conditioning" means the supply of air to rooms or spaces by means which provide for the treatment of the air in at least two of the following ways:

      heating — cooling — any other kind of treatment, e.g. humidification;

    • "ventilation" means the supply of air to, or its extraction from, rooms or spaces, and systems for circulating air within rooms or spaces, but does not cover the mere treatment of air being supplied to, extracted from, or circulated within, rooms or spaces.
  3. Processes using enzymes or micro-organisms in order to:
    1. liberate, separate or purify a pre-existing compound or composition, or to
    2. treat textiles or clean solid surfaces of materials
    are further classified in subclass C12S.  [5]
 F24F
Subclass index
AIR-CONDITIONING
Room units; central systems; other systems or apparatus 1/00; 3/00; 5/00
AIR-HUMIDIFICATION 6/00
VENTILATION 7/00
SCREENING BY AIR CURRENTS 9/00
COMMON DETAILS
Control, safety 11/00
Use of energy recovery systems 12/00
Other details 13/00

 F24H
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; tube furnaces for thermal non-catalytic cracking C10G 9/20; devices, e.g. valves, for venting and aerating enclosures F16K 24/00; steam traps or like apparatus F16T; steam generation F22; combustion apparatus F23; domestic stoves or ranges F24B, F24C; domestic- or space-heating systems F24D; furnaces, kilns, ovens, retorts F27; heat-exchangers F28; electric heating elements or arrangements H05B)
 F24H

Note(s)

  1. The distinguishing feature of the air heaters covered by this subclass is that the heat is predominantly released to the air by convection, mostly by forced circulation of the air. The domestic stoves or ranges covered by subclass F24B, F24C may also be fired or electric air heaters but they release their heat to a considerable extent by radiation and only to some extent by natural convention.  [3]
  2. In this subclass, the following terms or expressions are used with the meanings indicated:
    • "water" includes other liquids and means always the liquid to be heated;  [3]
    • "air" includes other gases or gas mixtures and means always the gas to be heated;  [3]
    • "furnace tubes" means tubes inside the heater wherein combustion is performed;  [3]
    • "fire tubes" means tubes inside the heater through which flue-gases flow from a combustion chamber located outside the tubes;  [3]
    • "heater" means apparatus including both heat generating means and means for transferring the generated heat to water or air.  [3]
  3. All storage heaters are classified in group F24H 7/00.  [3]
 F24H
Subclass index
WATER HEATERS 1/00
AIR HEATERS; STORAGE HEATERS 3/00; 7/00
FLUID HEATERS USING HEAT PUMPS 4/00
COMBINATIONS OF WATER AND AIR HEATERS 6/00
FLUID HEATERS FOR EXTRACTING LATENT HEAT FROM FLUE GASES 8/00
DETAILS 9/00

 F24J
PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR (materials therefor C09K 5/00; engines or other mechanisms for producing mechanical power from heat, see the relevant classes, e.g. F03G for using natural heat)
 F24J

Note(s)

Processes using enzymes or micro-organisms in order to:

  1. liberate, separate or purify a pre-existing compound or composition, or to
  2. treat textiles or clean solid surfaces of materials
are further classified in subclass C12S.  [5]