US PATENT SUBCLASS 236 / 13
.~ Plenum type

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

12.1  DF  MIXING FLUID OF DISSIMILAR TEMPERATURE {6}
13.~ Plenum type

DEFINITION

Classification: 236/13

(under subclass 12.1) Devices controlling the mixing of warm and cold air in the plenum type of heating systems according to the temperature of the hot or cold air, mixed air, or apartment to be heated.