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} |
260 | DF | .~.~.~ Variable rate of heating or cooling (e.g., plural stages, etc.) {1} |
261 | DF | .~.~.~.~ Sequentially activated heat sources or cool sources {1} |
262 | .~.~.~.~.~ Timer |