Is it true that two pipe heating and cooling systems allow for both heating and cooling at the same time?

A two-pipe heating and cooling system is designed to distribute either hot or chilled water through the same set of pipes depending on the system's operational state. In such systems, only one media—either hot water for heating or chilled water for cooling—can be delivered at any time. As a result, the system cannot provide simultaneous heating and cooling in different areas of the building.

This setup is efficient for many small to medium-sized buildings while allowing for control over temperature in occupied spaces, but it does not allow for simultaneous heating and cooling because the flow direction and the medium being used cannot be mixed in the same piping network at the same time. Therefore, stating that the system can permit both functions simultaneously is incorrect.