US PATENT SUBCLASS 454 / 148
.~.~.~ Ducting to heat exchanger

Current as of: June, 1999
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454 /   HD   VENTILATION

69  DF  VEHICLE (E.G., AUTOMOBILE, ETC.) {15}
143  DF  .~ Having inlet airway {7}
146  DF  .~.~ Including exterior cowl inlet {3}
148.~.~.~ Ducting to heat exchanger

DEFINITION

Classification: 454/148

Ducting to heat exchanger:

(under subclass 146) Subject matter comprising means for directing air from the aperture to a nonspecific heat transferring structure for warming or cooling the air prior to admittance of the air to the ventilated space.

(1) Note. See the class definition for what constitutes a nonspecific heat transferring structure such as is appropriate for this class. Recitation of an "air conditioning unit" or a "heater" does not exclude a patent from this class.

SEE OR SEARCH CLASS

62, Refrigeration, various subclasses for a means for ventilating a space in combination with specific cooling or refrigerating structure.

237, Heating Systems, various subclasses for a means for ventilating a space in combination with specific heating structure.