F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING AND 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; specially adapted for vehicles, see the relevant sub-classes of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements and arrangements H05B)
 F24

Note(s)

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

  1. "Stove" includes an open fire.
  2. "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

 F24C
OTHER DOMESTIC STOVES OR RANGES; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION (radiator stoves of the fluid-circulating type F24H)

 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)

 F24F
AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (devices for ventilating greenhouses A01G; disinfecting or sterilising of air A61L; devices for reconditioning breathing air in sealed rooms or for ventilating gas-proof 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; 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; ventilation or air-conditioning specially adapted for vehicles, see the relevant vehicle classes; apparatus for generating ions to be introduced into non-enclosed gases, e.g. the atmosphere, H01T 20/02)
 F24F

Note(s)

  1. In this sub-class, the following terms are used with the meanings indicated:
    1. "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:
      1. heating,
      2. cooling,
      3. any other kind of treatment, e.g. humidification.
    2. "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 heating of rooms or spaces by the supply of heated air. The supply or circulation systems may include means for cooling the air or for treating the air in any other way than cooling or heating.
  2. Air-humidification as auxiliary treatment in air-conditioning, i.e. in units wherein the air is also either cooled or heated, is covered by groups F24F 1/00 or F24F 3/14. Air-humidification per se, e.g. "room humidifiers", is covered by group F24F 6/00[3]

 F24H
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL (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 per se 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 per se H05B)
 F24H

Note(s)

  1. In this sub-class, the following terms are used with the meanings indicated: [3]
    1. "Water" includes other liquids; "air" includes other gases or gas mixtures; "water" and "air" always mean, respectively, the liquid and gas to be heated. [3]
    2. "Furnace tubes" means tubes inside the heater wherein combustion is performed. [3]
    3. "Fire tubes" means tubes inside the heater through which flue-gases flow from a combustion chamber located outside the tubes. [3]
    4. "Heater" refers to apparatus including both heat generating means and means for transferring the generated heat to water or air. [3]
  2. The distinguishing feature of the air heaters classified in sub-class F24H 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 sub-classes 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 convection. Attention is, however, drawn to the fact that all storage heaters are classified in F24H 7/00[3]

 F24J
PRODUCING HEAT, USING HEAT, OR HEATING, NOT OTHERWISE PROVIDED FOR (engines or other mechanisms for producing mechanical power from heat, see the relevant classes, e.g. F03G for using solar energy)