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.
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.