US PATENT SUBCLASS 165 / 224
.~.~.~.~ Additional humidity sensor (e.g., located outside of conditioned space, etc.)

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

200  DF  WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
201  DF  .~ Having heating and cooling capability {13}
222  DF  .~.~ Humidity control {2}
223  DF  .~.~.~ Humidity sensor measures humidity of air in conditioned space {3}
224.~.~.~.~ Additional humidity sensor (e.g., located outside of conditioned space, etc.)

DEFINITION

Classification: 165/224

Additional humidity sensor(e.g., located outside of conditioned space, etc.):

(under subclass 223) Subject matter further including a second sensing means to determine atmospheric water vapor content in the area or in another location.