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IPC 7
F24D-F24D01910

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING


F 24HEATING; 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 to B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)


F 24 DDOMESTIC- 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)


Note

 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]


Subclass Index

CENTRAL HEATING SYSTEMS 

With heat-transfer fluid: steam; hot water; hot air or exhaust gas; other fluid 

F24D 1/00; F24D 3/00; F24D 5/00; F24D 7/00 

Combinations 

F24D 9/00 

District heating systems 

F24D 10/00 

By heat storage 

F24D 11/00 

Other systems 

F24D 12/00 

OTHER DOMESTIC- OR SPACE-HEATING SYSTEMS 

Electric; Other 

F24D 13/00; F24D 15/00 

DOMESTIC HOT-WATER SUPPLY 

F24D 17/00 

DETAILS 

F24D 19/00 



Central heating systems


1/

00Steam central heating systems (F24D 10/00, F24D 11/00 take precedence)

1/

02.operating with live steam

1/

04.operating with exhaust steam

1/

06.operating with superheated steam

1/

08.Feed-line arrangements, e.g. providing for one-pipe system


3/

00Hot-water central heating systems (F24D 10/00, F24D 11/00 take precedence)

3/

02.with forced circulation, e.g. by pumps

3/

04.with the water under high pressure

3/

06..Arrangements or devices for maintaining high pressure

3/

08.in combination with systems for domestic hot-water supply

3/

10.Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks

3/

12.Tube and panel arrangements for ceiling, wall, or underfloor heating (electric underfloor heating F24D 13/02; special adaptations of floors for incorporating ducts, e.g. for heating or ventilating, E04B 5/48; building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, E04C 1/39; building elements of relatively thin form for the construction of parts of buildings with special adaptations for auxiliary purposes, e.g. serving for locating conduits, E04C 2/52)  [4]

3/

14..incorporated in a ceiling, wall or floor  [4]

3/

16..mounted on, or adjacent to, a ceiling, wall or floor  [4]

3/

18.using heat pumps  [5]


5/

00Hot-air central heating systems (F24D 10/00, F24D 11/00 take precedence; air conditioning F24F); Exhaust-gas central heating systems

5/

02.operating with discharge of hot air into the space or area to be heated

5/

04..with return of the air to the air heater

5/

06.operating without discharge of hot air into the space or area to be heated

5/

08..with hot air led through radiators

5/

10..with hot air led through heat-exchange ducts in the walls, floor, or ceiling

5/

12.using heat pumps  [5]


7/

00Central heating systems employing heat-transfer fluids not covered by groups F24D 1/00 to F24D 5/00, e.g. oil, salt, gas (F24D 10/00, F24D 11/00 take precedence)


9/

00Central heating systems employing combinations of heat-transfer fluids covered by two or more of groups F24D 1/00 to F24D 7/00 (F24D 10/00, F24D 11/00 take precedence)

9/

02.Hot water and steam systems


10/

00District heating systems  [5]


11/

00Central heating systems using heat accumulated in storage masses (self-contained storage heating units F24D 15/02; storage masses, see the relevant subclasses)

11/

02.using heat pumps


12/

00Other central heating systems

12/

02.having more than one heat source (F24D 3/18, F24D 5/12, F24D 11/02 take precedence)  [5]


Other domestic- or space-heating systems


13/

00Electric heating systems (electric water or air heaters F24H)

13/

02.solely using resistance heating, e.g. underfloor heating

13/

04.using electric heating of heat-transfer fluid in separate units of the system


15/

00Other domestic- or space-heating systems

15/

02.consisting of self-contained heating units, e.g. storage heaters  [3]

15/

04.using heat pumps  [5]



17/

00Domestic hot-water supply systems (combined with domestic- or space-heating systems F24D 1/00 to F24D 15/00)

17/

02.using heat pumps  [5]


19/

00Details (of water or air heaters F24H 9/00; of heat-exchange or heat-transfer apparatus, of general application F28F) [3]

19/

02.Arrangement of mountings or supports for radiators  [3]

19/

04..in skirtings  [3]

19/

06.Casings, cover lids or ornamental panels, for radiators  [3]

19/

08.Arrangements for drainage, venting or aerating (valves for drainage F16K, e.g. F16K 21/00, for venting or aerating F16K 24/00)  [3]

19/

10.Arrangement or mounting of control or safety devices (control valves F16K; only the heater being controlled F24H 9/20)  [3]


  
 

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