(0)F24H:0/1:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING...
F24H
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F 24 H

 FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL (tube furnaces for thermal non-catalytic cracking C 10 G 9/20; devices, e.g. valves, for venting and aerating enclosures F 16 K 24/00; steam traps or like apparatus F 16 T; steam generation F 22; combustion apparatus F 23; domestic stoves or ranges F 24 B, F 24 C; domestic- or space-heating systems F 24 D; furnaces, kilns, ovens, retorts F 27; heat-exchangers F 28; electric heating elements or arrangements H 05 B)
 

Notes

(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 F 24 B, F 24 C 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:
 

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 "water" includes other liquids and means always the liquid to be heated; [3]
 

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 "air" includes other gases or gas mixtures and means always the gas to be heated; [3]
 

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 "furnace tubes" means tubes inside the heater wherein combustion is performed; [3]
 

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 "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 F 24 H 7/00. [3]

 

 

 
 

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/ 00 Water heaters having heat generating means, e.g. boiler, flow-heater, water-storage heater (F 24 H 7/00, F 24 H 8/00 take precedence; details F 24 H 9/00; steam boilers F 22 B; domestic stoves or ranges with additional provisions for heating water F 24 B 9/00, F 24 C 13/00) [5]

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/ 06 • Portable or mobile, e.g. collapsible  

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

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/ 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 (F 24 H 1/50 takes precedence) [5]  

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/ 12 • • in which the water is kept separate from the heating medium  

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/ 14 • • • by tubes, e.g. bent in serpentine form  

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/ 16 • • • • helically or spirally coiled  

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/ 18 • Water-storage heaters (F 24 H 1/50 takes precedence; combined with water-heating stoves for central heating F 24 H 1/22) [5]  

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/ 20 • • with immersed heating elements, e.g. electric elements or furnace tubes  

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/ 22 • Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating (F 24 H 1/50 takes precedence) [5]  

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/ 24 • • with water mantle surrounding the combustion chamber or chambers (F 24 H 1/40, F 24 H 1/44 take precedence) [3]  

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/ 26 • • • the water mantle forming an integral body  

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/ 28 • • • • including one or more furnace or fire tubes  

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/ 30 • • • the water mantle being built-up from sections  

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/ 32 • • • • with vertical sections arranged side by side  

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/ 34 • • with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side (F 24 H 1/24, F 24 H 1/44 take precedence)  

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/ 36 • • • the water chamber including one or more fire tubes  

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/ 38 • • with water contained in separate elements, e.g. radiator-type element (F 24 H 1/40, F 24 H 1/44 take precedence)  

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/ 40 • • with water tube or tubes (F 24 H 1/44 takes precedence)  

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/ 41 • • • in serpentine form [3]  

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/ 43 • • • helically or spirally coiled [3]  

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/ 44 • • with combinations of two or more of the types covered by groups F 24 H 1/24 to F 24 H 1/40  

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/ 46 • Water heaters having plural combustion chambers [2,5]  

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/ 48 • Water heaters for central heating incorporating heaters for domestic water [5]  

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/ 50 • • incorporating domestic water tanks [5]  

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/ 52 • • incorporating heat exchangers for domestic water (F 24 H 1/50 takes precedence) [5]  
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