15 years has operated a lower performance to 6kW device. It had to be supplied from each other in about 5m distance 3 outlets. In the kitchen sink, the temperature was not satisfactory with 40 degrees. For the hand basin, the temperature was fine, but the shower operation was often the fault message. The acquired unit here has the best performance and delivers to all 3 spout just above 60 ° C. To enable a correct flow rate, only had a fine-throttling of the Be made Auslaufventielen (according to the electronic Heizwiderstandsregelung).