| 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} |
| 225 | DF | .~.~.~.~ Humidity sensor controls indirect-contact cooling means {3} |
| 227 | ![]() | .~.~.~.~.~ Air bypass of indirect-contact cooling means |