Quiet as a whisper and unique in this form worldwide. With its large modulation range, the SWM pro is suitable for heating and fast hot water preparation. It can reach supply temperatures of up to 78°C and is ideal for single- or multi-family houses that are newly built or renovated. The double-shell housing concept separates function and appearance, so the inner housing is tight and safe and an extremely aesthetic outer housing characterizes the appearance. The demand-oriented speed control of the compressor also ensures the best efficiency in power output and longer machine running times.