enrörssystem

Enrörssystem is a heating system that uses a single pipe to circulate hot water to multiple radiators. Unlike two-pipe systems which have separate supply and return pipes, an enrörssystem connects radiators in series. Water flows from the boiler through the pipe, reaching each radiator in sequence. After passing through a radiator, the water, now cooler, continues in the same pipe to the next radiator.

This configuration means that radiators further down the line will receive water at a lower temperature than those closer to the boiler. Consequently, radiators at the end of the circuit may require a larger size or higher output to achieve the desired room temperature. Installation is generally simpler and requires less piping material compared to a two-pipe system, which can lead to lower initial costs. However, balancing the system to ensure even heat distribution can be more challenging. Adjusting the flow to individual radiators is typically done using thermostatic radiator valves (TRVs) or manual lockshield valves. Enrörssystem can be found in older buildings, particularly in some parts of Europe.