That's something that should be in the Owners Manual.
I've heard this before, but often wonder how they would do it with electric. Getting popular in homes, tankless Gas Hot Water tanks are about $1000. But electric, what Kilowattage? (I have 50/100 amp services going to commercial dishwashers just for 180 deg rinses)
To raise 1lb of water 1 deg F req. 1 BTU. One gal(imp) 10lbs. So 30 deg (I'm assuming F not C) gives you a 100 deg shower but a little to cold for dishes.
You get 1500 watts typical at most sites(but your fridge maybe 300-500), times 3.413btu/watt or about 5000 btu/hr. Maybe 17gph. Or 9.5gph if your talking C.
I would really like to know if this is electric or propane??
I have seen Marko's/Rodger replacement shower head, so maybe 17/9.5 gph isn't out of the question. http://www.classbforum.com/phpBB2/vi...ht=shower+head