(under subclass 228) Subject matter wherein the apparatus for moving the existing air is combined with a nominally recited means for raising or lowering air temperature in the ventilated space.
(1) Note. The mere naming of a furnace, heat exchanger, or air conditioner in the claims will allow for a document to be placed in this subclass. However, if the document claims a specific furnace, heat exchanger, or air conditioner, it should be classified elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233, for a means having forced recirculation alone combined with a nominally recited heating or cooling means.
SEE OR SEARCH CLASS
62, Refrigeration, appropriate subclasses for specific cooling or refrigeration means in a ventilating system.
165, Heat Exchange, appropriate subclasses for specific heating and cooling means in a ventilating system. 237, Heating Systems, particularly
48, and 53 for specific furnace means in a ventilating system and the Search Class notes of the class definition and subclass 46 for the line between Class 237 and Class 454.
