PRODUCING HEAT, USING HEAT, OR HEATING, NOT OTHERWISE PROVIDED FOR (engines or other mechanisms for producing mechanical power from heat, see the relevant classes, e.g. Fulltext... Hierarchy... Expanded...F03G for using solar energy)
F24J 1/00
Exothermal chemical reactions not involving a supply of free oxygen gas; Apparatus or devices, e.g. stoves or ranges, for using the heat therefrom
F24J 1/02
·
the reactions involving chemically-bound oxygen
F24J 1/04
·
the reactions involving combination of elements other than oxygen
F24J 3/00
Other production of heat, use of heat, or heating
F24J 3/02
·
Using natural heat, e.g. solar; Stoves or ranges using solar heat