direct return system

direct return system

[di¦rekt ri′tərn ‚sis·təm]
(mechanical engineering)
In a heating or cooling system, a piping arrangement in which the fluid is returned to its origin (boiler or evaporator) by the shortest direct path after it has passed through each heat exchanger.

direct return system

A piping arrangement for a heating system (or air-conditioning or refrigeration system) in which the heating (or cooling) fluid, after it has passed through each heat exchanger, is returned to the boiler (or evaporator) by the shortest direct path.