My friends and I go on a 3 week hunting trip every year. After the first week the air gets a little "thick" to say the least. The creeks have chunks of ice in them so bathing in them is out of the question. Saw the ad for the water heater and thought "what the heck, lets try it" Well it arrived the other day. Hooked it up to a 45 gal rain barrel, a 12 volt RV water pump and a car battery, a 20 # propane bottle and" PRESTO" Worked like a charm.Even my wife was impressed. Can't wait for hunting season to show it off to the boys. Would recomend this to anyone.