|  | 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 Fulltext... Hierarchy... Expanded...A01G 13/06; baking ovens and apparatus Fulltext... Hierarchy... Expanded...A21B; cooking devices other than ranges Fulltext... Hierarchy... Expanded...A47J; specially adapted for vehicles, see the relevant sub-classes of classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B60-B64; combustion apparatus in general Fulltext... Hierarchy... Expanded...F23; drying Fulltext... Hierarchy... Expanded...F26B; ovens in general Fulltext... Hierarchy... Expanded...F27; electric heating elements and arrangements Fulltext... Hierarchy... Expanded...H05B)

|  | F24 |
Note(s) In this class, the following terms are used with the meanings indicated: "Stove" includes an open fire. "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 Fulltext... Hierarchy... Expanded...F24H)

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

|  | F24F |
AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (devices for ventilating greenhouses Fulltext... Hierarchy... Expanded...A01G; disinfecting or sterilising of air Fulltext... Hierarchy... Expanded...A61L; devices for reconditioning breathing air in sealed rooms or for ventilating gas-proof shelters Fulltext... Hierarchy... Expanded...A62B; filtering, washing or drying of gases Fulltext... Hierarchy... Expanded...B01D; mixing gases with vapours or liquids in general Fulltext... Hierarchy... Expanded...B01F 3/00; spraying Fulltext... Hierarchy... Expanded...B05B, Fulltext... Hierarchy... Expanded...B05D; removing dirt or fumes from areas where they are produced Fulltext... Hierarchy... Expanded...B08B 15/00; production of ozone Fulltext... Hierarchy... Expanded...C01B 13/10; chimneys or flues Fulltext... Hierarchy... Expanded...E04F 17/02, Fulltext... Hierarchy... Expanded...E04H 12/28, Fulltext... Hierarchy... Expanded...F23J 11/00, Fulltext... Hierarchy... Expanded...F23L 17/02; air ducts or conduits Fulltext... Hierarchy... Expanded...E04F 17/04, Fulltext... Hierarchy... Expanded...F16L; ventilation in doors or windows Fulltext... Hierarchy... Expanded...E06B 7/02; fans, blowers Fulltext... Hierarchy... Expanded...F04; noise-absorbing in pipes or pipe systems Fulltext... Hierarchy... Expanded...F16L; tops for chimneys or ventilating shafts Fulltext... Hierarchy... Expanded...F23L; cooling Fulltext... Hierarchy... Expanded...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, Fulltext... Hierarchy... Expanded...H01T 20/02)

|  | F24F |
Note(s) In this sub-class, the following terms 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 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. 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 Fulltext... Hierarchy... Expanded...F24F 1/00 or Fulltext... Hierarchy... Expanded...F24F 3/14. Air-humidification per se, e.g. "room humidifiers", is covered by group Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C10G 9/20; devices, e.g. valves, for venting and aerating enclosures Fulltext... Hierarchy... Expanded...F16K 24/00; steam traps or like apparatus Fulltext... Hierarchy... Expanded...F16T; steam generation Fulltext... Hierarchy... Expanded...F22; combustion apparatus per se Fulltext... Hierarchy... Expanded...F23; domestic stoves or ranges Fulltext... Hierarchy... Expanded...F24B, Fulltext... Hierarchy... Expanded...F24C; domestic- or space-heating systems Fulltext... Hierarchy... Expanded...F24D; furnaces, kilns, ovens, retorts Fulltext... Hierarchy... Expanded...F27; heat-exchangers Fulltext... Hierarchy... Expanded...F28; electric heating elements or arrangements per se Fulltext... Hierarchy... Expanded...H05B)

|  | F24H |
Note(s) In this sub-class, the following terms are used with the meanings indicated: [3] "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] "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" refers to apparatus including both heat generating means and means for transferring the generated heat to water or air. [3] The distinguishing feature of the air heaters classified in sub-class Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F24B, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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. Fulltext... Hierarchy... Expanded...F03G for using solar energy)