|  | 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.

|  | 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]

|  | F24H 1/00 |
Water heaters having heat generating means, e.g. boiler, flow-heater, water-storage heater (Fulltext... Hierarchy... Expanded...F24H 7/00 takes precedence; details Fulltext... Hierarchy... Expanded...F24H 9/00; steam boilers Fulltext... Hierarchy... Expanded...F22B; domestic stoves or ranges with additional provisions for heating water Fulltext... Hierarchy... Expanded...F24B 9/00, Fulltext... Hierarchy... Expanded...F24C 13/00)

|  | F24H 1/04 |
( transferred to Fulltext... Hierarchy... Expanded...F24B 9/00, Fulltext... Hierarchy... Expanded...F24C 13/00 )

|  | F24H 1/06 |
· | Portable or mobile, e.g. collapsible

|  | F24H 1/08 |
· | Packaged or self-contained boilers, i.e. water heaters with control devices and pump in a single unit

|  | F24H 1/10 |
· | Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium

|  | F24H 1/12 |
· · | in which the water is kept separate from the heating medium

|  | F24H 1/14 |
· · · | by tubes, e.g. bent in serpentine form

|  | F24H 1/16 |
· · · · | helically or spirally coiled

|  | F24H 1/18 |
· | Water-storage heaters (combined with water-heating stoves for central heating Fulltext... Hierarchy... Expanded...F24H 1/22)

|  | F24H 1/20 |
· · | with immersed heating elements, e.g. electric elements or furnace tubes

|  | F24H 1/22 |
· | Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating

|  | F24H 1/24 |
· · | with water mantle surrounding the combustion chamber or chambers (Fulltext... Hierarchy... Expanded...F24H 1/40, Fulltext... Hierarchy... Expanded...F24H 1/44 take precedence)

|  | F24H 1/26 |
· · · | the water mantle forming an integral body

|  | F24H 1/28 |
· · · · | including one or more furnace or fire tubes

|  | F24H 1/30 |
· · · | the water mantle being built-up from sections

|  | F24H 1/32 |
· · · · | with vertical sections arranged side by side

|  | F24H 1/34 |
· · | with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side (Fulltext... Hierarchy... Expanded...F24H 1/24, Fulltext... Hierarchy... Expanded...F24H 1/44 take precedence)

|  | F24H 1/36 |
· · · | the water chamber including one or more fire tubes

|  | F24H 1/38 |
· · | with water contained in separate elements, e.g. radiator-type element (Fulltext... Hierarchy... Expanded...F24H 1/40, Fulltext... Hierarchy... Expanded...F24H 1/44 take precedence)

|  | F24H 1/40 |
· · | with water tube or tubes (Fulltext... Hierarchy... Expanded...F24H 1/44 takes precedence)

|  | F24H 1/41 |
· · · | in serpentine form [3]

|  | F24H 1/42 |
( transferred to Fulltext... Hierarchy... Expanded...F24H 1/41, Fulltext... Hierarchy... Expanded...F24H 1/43, covered by Fulltext... Hierarchy... Expanded...F24H 1/40 )

|  | F24H 1/43 |
· · · | helically or spirally coiled [3]

|  | F24H 1/44 |
· · | with combinations of two or more of the types covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F24H 1/24-F24H 1/40

|  | F24H 1/46 |
( covered by Fulltext... Hierarchy... Expanded...F28 )

|  | F24H 3/00 |
Air heaters having heat generating means (Fulltext... Hierarchy... Expanded...F24H 7/00 takes precedence; details Fulltext... Hierarchy... Expanded...F24H 9/00; domestic stoves or ranges with additional provisions for convection heating of air Fulltext... Hierarchy... Expanded...F24B, Fulltext... Hierarchy... Expanded...F24C)

|  | F24H 3/02 |
· | with forced circulation (Fulltext... Hierarchy... Expanded...F24H 3/12 takes precedence)

|  | F24H 3/04 |
· · | the air being in direct contact with the heating medium, e.g. electric heating element

|  | F24H 3/06 |
· · | the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators

|  | F24H 3/08 |
· · · | by tubes

|  | F24H 3/10 |
· · · | by plates

|  | F24H 3/12 |
· | with additional heating arrangements

|  | F24H 3/14 |
( covered by Fulltext... Hierarchy... Expanded...F28 )

|  | F24H 6/00 |
Combined water and air heaters

|  | F24H 7/00 |
Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release (domestic stoves or ranges with additional heat storage masses Fulltext... Hierarchy... Expanded...F24B 1/24, Fulltext... Hierarchy... Expanded...F24C 15/34; materials for storage masses, see the relevant sub-classes)

|  | F24H 7/02 |
· | the released heat being conveyed to a transfer fluid, e.g. air, water

|  | F24H 7/04 |
· · | with forced circulation of the transfer fluid

|  | F24H 7/06 |
· | the released heat being radiated

|  | F24H 9/00 |
Details

|  | F24H 9/02 |
· | Casings; Cover lids; Ornamental panels

|  | F24H 9/04 |
( transferred to Fulltext... Hierarchy... Expanded...F24D 19/06 )

|  | F24H 9/06 |
· | Arrangement of mountings or supports

|  | F24H 9/08 |
( transferred to Fulltext... Hierarchy... Expanded...F24D 19/02, covered by Fulltext... Hierarchy... Expanded...F24H 9/06 )

|  | F24H 9/10 |
( transferred to Fulltext... Hierarchy... Expanded...F24D 19/04 )

|  | F24H 9/12 |
· | Connecting heaters to circulation pipes (pipe joints in general Fulltext... Hierarchy... Expanded...F16L)

|  | F24H 9/14 |
· | Connecting different sections, e.g. in water heaters (in radiators Fulltext... Hierarchy... Expanded...F28F 9/26)

|  | F24H 9/16 |
· | Arrangements for water drainage (valves for drainage Fulltext... Hierarchy... Expanded...F16K, e.g. Fulltext... Hierarchy... Expanded...F16K 21/00; in pipes or pipe systems in general Fulltext... Hierarchy... Expanded...F16L 55/00; in domestic- or space-heating systems Fulltext... Hierarchy... Expanded...F24D 19/08)

|  | F24H 9/18 |
· | Arrangement or mounting of grates, burners, or heating elements (burners Fulltext... Hierarchy... Expanded...F23D; grates Fulltext... Hierarchy... Expanded...F23H; electric heating elements Fulltext... Hierarchy... Expanded...H05B)

|  | F24H 9/20 |
· | Arrangement or mounting of control or safety devices (control valves per se Fulltext... Hierarchy... Expanded...F16K; safety devices for burners Fulltext... Hierarchy... Expanded...F23D; combustion control devices Fulltext... Hierarchy... Expanded...F23N; of systems comprising a heater, see the relevant sub-classes, e.g. of control heating systems Fulltext... Hierarchy... Expanded...F24D 19/10; control devices per se Fulltext... Hierarchy... Expanded...G05; automatic switching for electric heating apparatus Fulltext... Hierarchy... Expanded...H05B 1/02)