The refrigerant liquid tanks form a refrigerant water closed circulation system through pipes, a refrigerator, a refrigerant water pump and a refrigerant water throttle valve to supply a cold source.

Based on the above mentioned works, using "King View" developed a computer automatic monitoring program, and achieves the automatic monitoring of the Laboratory's cold water supply system.

A typical dual duct system would have 2 zone supply air paths - one for the hot air and one for the cold air - and 1 zone return air path.