(under the class definition) Apparatus for the treatment of material additional to the parts of the apparatus by (1)
selectively adding heat to or removing it from the external material, (2) simultaneously adding heat to and removing it from the same external material and (3) by adding heat to and removing it from distinct external materials where more than a transfer or heat from one of the materials to the other is involved.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2, for heating and cooling processes.
42+, for a heated and cooled vehicle.
48.1+, for a structurally installed heating and cooling system.
201+, for automatically controlled heating and cooling apparatus. SEE OR SEARCH CLASS
7, 79, 90, 122, 159+, 173, 238.1+, 277+, and 324.1+, for combined heating and cooling performed by a refrigerating producing system and subclass 238.1 for a refrigeration producer utilizing a disparate heat source as an operating energy source. The line between Classes 62 and 165 on combined heating and cooling is: (1) Class 62 takes (a) a refrigeration producing system and related processes used for both heating and cooling even though the rejected heat is utilized, and (b) a refrigeration system combined with heating means for removing or preventing the deposition of condensate (frost) or for thawing a freezing mold; (2) Class 165 takes (a) a refrigeration producer having means to convert the same to a heating system so that it no longer functions as a refrigeration producer (as by omitting the evaporator) and (b) a refrigeration producer combined with heating means not provided for under (1) above.
236, Automatic Temperature and Humidity Regulation, appropriate subclasses, for regulating a single temperature changing element to maintain plural temperatures, which single element may at some times act as a heater and other times as a cooler; see particularly
