|  | 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 words 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.

|  | F24D |
DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS (preventing corrosion Fulltext... Hierarchy... Expanded...C23F; water supply in general Fulltext... Hierarchy... Expanded...E03; elements and components of the systems Fulltext... Hierarchy... Expanded...F24H; combined heating and refrigeration systems Fulltext... Hierarchy... Expanded...F25B; removing furring Fulltext... Hierarchy... Expanded...F28G; control in general Fulltext... Hierarchy... Expanded...G05)

|  | F24D 1/00 - F24D 12/00 |
Central heating systems, i.e. systems in which heat generated or stored at central sources is distributed by means of a transfer fluid to the spaces or areas to be heated

|  | F24D 1/00 |
Steam central heating systems (Fulltext... Hierarchy... Expanded...F24D 11/00 takes precedence)

|  | F24D 1/02 |
· | operating with live steam

|  | F24D 1/04 |
· | operating with exhaust steam

|  | F24D 1/06 |
· | operating with superheated steam

|  | F24D 1/08 |
· | Feed-line arrangements, e.g. providing for one-pipe system

|  | F24D 3/00 |
Hot-water systems (Fulltext... Hierarchy... Expanded...F24D 11/00 takes precedence)

|  | F24D 3/02 |
· | with forced circulation, e.g. by pumps (pump constructions Fulltext... Hierarchy... Expanded...F04)

|  | F24D 3/04 |
· | with the water under high pressure

|  | F24D 3/06 |
· · | Arrangements or devices for maintaining high pressure

|  | F24D 3/08 |
· | in combination with systems for domestic hot-water supply

|  | F24D 3/10 |
· | Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks

|  | F24D 5/00 |
Hot-air systems (Fulltext... Hierarchy... Expanded...F24D 11/00 takes precedence; conditioning of air Fulltext... Hierarchy... Expanded...F24F); Exhaust-gas central heating systems

|  | F24D 5/02 |
· | operating with discharge of hot air into the space or area to be heated

|  | F24D 5/04 |
· · | with return of the air to the air heater

|  | F24D 5/06 |
· | operating without discharge of hot air into the space or area to be heated

|  | F24D 5/08 |
· · | with hot air led through radiators

|  | F24D 5/10 |
· · | with hot air led through heat-exchange ducts in the walls, floor, or ceiling

|  | F24D 7/00 |
Systems employing heat-transfer fluids not covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F24D 1/00-F24D 5/00, e.g. oil, salt, gas (Fulltext... Hierarchy... Expanded...F24D 11/00 takes precedence)

|  | F24D 9/00 |
Combinations of the systems covered by two or more of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F24D 1/00-F24D 7/00 (Fulltext... Hierarchy... Expanded...F24D 11/00 takes precedence)

|  | F24D 9/02 |
· | Combinations of hot-water and steam systems

|  | F24D 11/00 |
Systems using heat accumulated in storage masses

|  | F24D 11/02 |
· | using heat pumps

|  | F24D 12/00 |
Other central heating systems

|  | F24D 13/00 - F24D 15/00 |
Other space- or area-heating systems

|  | F24D 13/00 |
Electric heating systems

|  | F24D 13/02 |
· | solely using resistance heating, e.g. underfloor heating

|  | F24D 13/04 |
· | using electric heating of heat-transfer fluid in separate units of the system

|  | F24D 15/00 |
Heating systems consisting of self-contained heating units, e.g. storage heaters (Fulltext... Hierarchy... Expanded...F24D 13/00 takes precedence); Other space-heating systems

|  | F24D 17/00 |
Domestic hot-water supply systems (combined with domestic- or space-heating systems Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F24D 1/00-F24D 15/00)