<titlePart> <text>SECTION F <emdash/> MECHANICAL ENGINEERING</text> </titlePart> <titlePart> <text>LIGHTING</text> </titlePart> <titlePart> <text>HEATING</text> </titlePart> <titlePart> <text>WEAPONS</text> </titlePart> <titlePart> <text>BLASTING</text> </titlePart> <titlePart> <text>LIGHTING</text> </titlePart> <titlePart> <text>HEATING</text> </titlePart> <titlePart> <text>HEATING</text> </titlePart> <titlePart> <text>RANGES</text> </titlePart> <titlePart> <text>VENTILATING</text> <entryReference>protecting<NBSP/><GREF GLOBAL="" REFID="PLANT">plants</GREF> by heating in gardens, orchards, or forests<sref ref="A01G0013060000"/></entryReference> <entryReference>baking ovens and<NBSP/><GREF GLOBAL="" REFID="APPARATU">apparatus</GREF><sref ref="A21B"/></entryReference> <entryReference>cooking devices other than ranges <sref ref="A47J"/></entryReference> <entryReference>forging <sref ref="B21J"/>, <sref ref="B21K"/></entryReference> <entryReference>specially adapted for vehicles, <u>see</u> the relevant subclasses of classes <mref ref="B60" endRef="B64"/></entryReference> <entryReference>combustion<NBSP/><GREF GLOBAL="" REFID="APPARATU">apparatus</GREF> in general<sref ref="F23"/></entryReference> <entryReference>drying <sref ref="F26B"/></entryReference> <entryReference>ovens in general <sref ref="F27"/></entryReference> <entryReference>electric heating elements or arrangements <sref ref="H05B"/></entryReference> </titlePart> In this class, the following terms are used with the meanings indicated: "stove" includesapparatus which may have an open fire, e.g. fireplace; "range" means anapparatus for cooking having elements that perform different cooking operations or cooking and heating operations. <titlePart> <text>DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS</text> </titlePart> <titlePart> <text>DOMESTIC HOT-WATER SUPPLY SYSTEMS</text> </titlePart> <titlePart> <text>ELEMENTS OR COMPONENTS THEREFOR</text> <entryReference>preventing corrosion <sref ref="C23F"/></entryReference> <entryReference>water supply in general <sref ref="E03"/></entryReference> <entryReference>using steam or condensate extracted or exhausted from steam<NBSP/><GREF GLOBAL="" REFID="ENGIN">engine</GREF><NBSP/><GREF GLOBAL="" REFID="PLANT">plants</GREF> for heating purposes<sref ref="F01K0017020000"/></entryReference> <entryReference>steam traps <sref ref="F16T"/></entryReference> <entryReference>domestic stoves or ranges <sref ref="F24B"/>, <sref ref="F24C"/></entryReference> <entryReference>water or air heaters having heat generating means <sref ref="F24H"/></entryReference> <entryReference>combined heating and refrigeration systems <sref ref="F25B"/></entryReference> <entryReference>heat exchange<NBSP/><GREF GLOBAL="" REFID="APPARATU">apparatus</GREF> or elements<sref ref="F28"/></entryReference> <entryReference>removing furring <sref ref="F28G"/></entryReference> </titlePart> 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. <titlePart> <text>Central heating systems</text> </titlePart> <titlePart> <text>Steam central heating systems</text> <entryReference><sref ref="F24D0010000000"/>, <sref ref="F24D0011000000"/> take precedence</entryReference> </titlePart> <titlePart> <text>operating with live steam</text> </titlePart> <titlePart> <text>operating with exhaust steam</text> </titlePart> <titlePart> <text>operating with superheated steam</text> </titlePart> <titlePart> <text>Feed-line arrangements, e.g. providing for one-pipe system</text> </titlePart> <titlePart> <text>Hot-water central heating systems</text> <entryReference><sref ref="F24D0010000000"/>, <sref ref="F24D0011000000"/> take precedence</entryReference> </titlePart> <titlePart> <text>with forced circulation, e.g. by pumps</text> </titlePart> <titlePart> <text>with the water under high pressure</text> </titlePart> <titlePart> <text>Arrangements or devices for maintaining high pressure</text> </titlePart> <titlePart> <text>in combination with systems for domestic hot-water supply</text> </titlePart> <titlePart> <text>Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks</text> </titlePart> <titlePart> <text>Tube and panel<NBSP/><GREF GLOBAL="" REFID="ARRANGEMENTS_FOR">arrangements for</GREF> ceiling, wall, or underfloor heating</text> <entryReference>electric underfloor heating <sref ref="F24D0013020000"/></entryReference> <entryReference>special<NBSP/><GREF GLOBAL="" REFID="ADAPTATION">adaptations</GREF> of floors for incorporating ducts, e.g. for heating or ventilating,<sref ref="E04B0005480000"/></entryReference> <entryReference>building elements of block or other shape for the construction of parts of buildings characterised by special<NBSP/><GREF GLOBAL="" REFID="ADAPTATION">adaptations</GREF>, e.g. serving for locating conduits,<sref ref="E04C0001390000"/></entryReference> <entryReference>building elements of relatively thin form for the construction of parts of buildings with special<NBSP/><GREF GLOBAL="" REFID="ADAPTATION">adaptations</GREF> for auxiliary purposes, e.g. serving for locating conduits,<sref ref="E04C0002520000"/></entryReference> </titlePart> <titlePart> <text>incorporated in a ceiling, wall or floor</text> </titlePart> <titlePart> <text>mounted on, or adjacent to, a ceiling, wall or floor</text> </titlePart> <titlePart> <text>using heat pumps</text> </titlePart> <titlePart> <text>Hot-air central heating systems</text> <entryReference><sref ref="F24D0010000000"/>, <sref ref="F24D0011000000"/> take precedence</entryReference> <entryReference>air conditioning <sref ref="F24F"/></entryReference> </titlePart> <titlePart> <text>Exhaust-gas central heating systems</text> </titlePart> <titlePart> <text>operating with discharge of hot air into the space or area to be heated</text> </titlePart> <titlePart> <text>with return of the air to the air heater</text> </titlePart> <titlePart> <text>operating without discharge of hot air into the space or area to be heated</text> </titlePart> <titlePart> <text>with hot air led through radiators</text> </titlePart> <titlePart> <text>with hot air led through heat-exchange ducts in the walls, floor, or ceiling</text> </titlePart> <titlePart> <text>using heat pumps</text> </titlePart> <titlePart> <text>Central heating systems employing heat-transfer fluids not covered by groups <mref ref="F24D0001000000" endRef="F24D0005000000"/>, e.g. oil, salt, gas</text> <entryReference><sref ref="F24D0010000000"/>, <sref ref="F24D0011000000"/> take precedence</entryReference> </titlePart> <titlePart> <text>Central heating systems employing combinations of heat-transfer fluids covered by two or more of groups <mref ref="F24D0001000000" endRef="F24D0007000000"/></text> <entryReference><sref ref="F24D0010000000"/>, <sref ref="F24D0011000000"/> take precedence</entryReference> </titlePart> <titlePart> <text>Hot water and steam systems</text> </titlePart> <titlePart> <text>District heating systems</text> </titlePart> <titlePart> <text>Central heating systems using heat accumulated in storage masses</text> <entryReference>self-contained storage heating units <sref ref="F24D0015020000"/></entryReference> <entryReference>storage masses, <u>see</u> the relevant subclasses</entryReference> </titlePart> <titlePart> <text>using heat pumps</text> </titlePart> <titlePart> <text>Other central heating systems</text> </titlePart> <titlePart> <text>having more than one heat source</text> <entryReference><sref ref="F24D0003180000"/>, <sref ref="F24D0005120000"/>, <sref ref="F24D0011020000"/> take precedence</entryReference> </titlePart> <titlePart> <text>Other domestic- or space-heating systems</text> </titlePart> <titlePart> <text>Electric heating systems</text> <entryReference>electric water or air heaters <sref ref="F24H"/></entryReference> </titlePart> <titlePart> <text>solely using resistance heating, e.g. underfloor heating</text> </titlePart> <titlePart> <text>using electric heating of heat-transfer fluid in separate units of the system</text> </titlePart> <titlePart> <text>Other domestic- or space-heating systems</text> </titlePart> <titlePart> <text>consisting of self-contained heating units, e.g. storage heaters</text> </titlePart> <titlePart> <text>using heat pumps</text> </titlePart> <titlePart> <text>Domestic hot-water supply systems</text> <entryReference>combined with domestic- or space-heating systems <mref ref="F24D0001000000" endRef="F24D0015000000"/></entryReference> </titlePart> <titlePart> <text>using heat pumps</text> </titlePart> <titlePart> <text>Details</text> <entryReference>of water or air heaters <sref ref="F24H0009000000"/></entryReference> <entryReference>of heat-exchange or heat-transfer<NBSP/><GREF GLOBAL="" REFID="APPARATU">apparatus</GREF>, of general application<sref ref="F28F"/></entryReference> </titlePart> <titlePart> <text><GREF GLOBAL="" REFID="ARRANGEMENT_OF">Arrangement of</GREF> mountings or supports for radiators</text> </titlePart> <titlePart> <text>in skirtings</text> </titlePart> <titlePart> <text>Casings, cover lids or ornamental panels, for radiators</text> </titlePart> <titlePart> <text><GREF GLOBAL="" REFID="ARRANGEMENTS_FOR">Arrangements for</GREF> drainage, venting or aerating</text> <entryReference>valves for drainage <sref ref="F16K"/>, e.g. <sref ref="F16K0021000000"/>, for venting or aerating <sref ref="F16K0024000000"/></entryReference> </titlePart> <titlePart> <text>Arrangement or mounting of control or safety devices</text> <entryReference>control valves <sref ref="F16K"/></entryReference> <entryReference>only the heater being controlled <sref ref="F24H0009200000"/></entryReference> </titlePart>