F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F01 - 
F04
Subsection index
MACHINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
LIGHTING; 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; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
 F24

Note(s)

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

  • "stove" includes apparatus which may have an open fire, e.g. fireplace;
  • "range" means an apparatus for cooking having elements that perform different cooking operations or cooking and heating operations.

 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 17/00; 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)
 F24D

Note(s)

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]

 F24D
Subclass index
CENTRAL HEATING SYSTEMS
With heat-transfer fluid: steam; hot water; hot air or exhaust gas; other fluid 1/00; 3/00; 5/00; 7/00
Combinations 9/00
District heating systems 10/00
By heat storage 11/00
Other systems 12/00
OTHER DOMESTIC- OR SPACE-HEATING SYSTEMS
Electric; Other 13/00; 15/00
DOMESTIC HOT-WATER SUPPLY 17/00
DETAILS 19/00
 F24D 1/00 - 
F24D 12/00
Central heating systems
P:30 F24D 1/00
Steam central heating systems (F24D 10/00, F24D 11/00 take precedence)
P:40 F24D 3/00
Hot-water central heating systems (F24D 10/00, F24D 11/00 take precedence)
 F24D 3/10
·  Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
 F24D 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 1/00; 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]
P:50 F24D 5/00
Hot-air central heating systems (F24D 10/00, F24D 11/00 take precedence; air conditioning F24F); Exhaust-gas central heating systems
P:60 F24D 7/00
Central heating systems employing heat-transfer fluids not covered by groups F24D 1/00-F24D 5/00, e.g. oil, salt, gas (F24D 10/00, F24D 11/00 take precedence)
P:20 F24D 9/00
Central heating systems employing combinations of heat-transfer fluids covered by two or more of groups F24D 1/00-F24D 7/00 (F24D 10/00, F24D 11/00 take precedence)
P:0 F24D 10/00
District heating systems  [5]
P:10 F24D 11/00
Central heating systems using heat accumulated in storage masses (self-contained storage heating units F24D 15/00; storage masses, see the relevant subclasses)
P:70 F24D 12/00
Other central heating systems
 F24D 13/00 - 
F24D 15/00
Other domestic- or space-heating systems
P:80 F24D 13/00
Electric heating systems (electric water or air heaters F24H)
 F24D 13/02
·  solely using resistance heating, e.g. underfloor heating
P:90 F24D 15/00
Other domestic- or space-heating systems
P:100 F24D 17/00
Domestic hot-water supply systems (combined with domestic- or space-heating systems F24D 1/00-F24D 15/00)
 F24D 17/02
·  using heat pumps  [5]
P:110 F24D 19/00
Details (of water or air heaters F24H 9/00; of heat-exchange or heat-transfer apparatus, of general application F28F)  [3]