oh man, are you realy going to act like a 3 year old. everyone elese who have them including my family members are either living with how much more water they waist and either living with it or concidering putting a conventional water heater in.. do a search on the internet and all you read about is how much more they use.. maybe yours is powered by unicorns and rainbows, and is special.
at any rate I have decided I am not buying a truck camper or trailer or 5th wheel with hot water on demand, because as per my friends and family who have it they all agree they were shocked at how much more water it uses. and the countless you tube comparisons of water use (using stopwatches and measuring cups, thats a big no for me. Now your going to tell me they are falking the results probably.... anyways be happy with yours it seams to be a one off magical unit.