Water heaters have to be the most inefficient glorious devices ever devised by mankind. I would love to get tankless, but we are right on the border of where it makes sense in terms of temperature. Of course, that didn't stop them from exclusive use of a heat pump to heat the house in the summer and cool the house in the winter. Yeah, you read right. Anyhow, this one happens to come up just short of the upper range of "uses most energy." Dang, maybe the next one.