I have a home water heater Stiebel and the need to respond, he always relatively long and provides hot water. The connection of a water-saving shower head brought because no improvement but deterioration, since less water flows. By AMAZON I then become the Hansgrohe Crometta 85 Variojet attention and risked it once and was not disappointed as soon never came so far hot water from my water heater! Really class and highly recommended this shower head! And thanks to the many other reviewers with its positive good descriptions.