Hi TC, glad to see someone else try one of these. Although it will be a while before I install my " Ecotemp" in my bus, I have played with it a bit to see just how well it worked.It is absolutely great if you open up the flow--lots of hot water. However, if you stop the flow to "soap up etc" you will get a COLD surprise when you turn the water back on. For safety reasons I guess, the burner on these things turns off when it "thinks" there is no water resulting in a blast of cold water burrrr. Despite the tittering from the kids next door, I tried various fixes for the problem ( I was by the way Spedo clad --someone has to wear them!). The result of this "scientific study" was that I plan to use an electric solenoid valve to re circulate the water to the pump while the hot water is running to trick the heater (heater has a temp set so the thing will not blow up
). Let us know what you come up with---There's more than one way to skin a cat! UH OH!I have two GREAT cats so I better watch my language!