US PATENT SUBCLASS 165 / 264
.~.~.~.~ Simultaneous heating and cooling only in limited range around set point temperature

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}
253  DF  .~.~ Temperature sensor controlling temperature {4}
263  DF  .~.~.~ Area receives conditioning from simultaneously operated heating and cooling means (e.g., opposed and compensating heating and cooling, etc.) {1}
264.~.~.~.~ Simultaneous heating and cooling only in limited range around set point temperature

DEFINITION

Classification: 165/264

Simultaneous heating and cooling only in limited range around set point temperature:

(under subclass 263) Subject matter wherein the area is heated and cooled at the same time only when a measured temperature is within a limited range around a pre-determined desired temperature.