John Kogel Posted March 4, 2016 Report Share Posted March 4, 2016 The 40 gallon (US Gals.) Electric water heater is nearly new. House guests are expected for prolonged stays. I suggest a 10 gallon tank could be mounted on a shelf (sturdy shelf) above. For max efficiency, does the small tank serve as a pre-heater? Or does it go in as a downstream super heater, with the larger tank turned down as a pre-heater? Note: these are older folk, no 30 minute showers expected. They want a minimum cost for an average hot water supply for 3-4 people. Click to Enlarge 34.73 KB Quote Link to comment Share on other sites More sharing options...
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