Ok. You guys have convinced me to reconsider this. I was thinking about it about 10 years ago, and maybe that is when I heard the criticisms. When compared to the price of a heat pump water heater, I could install a TLHWH on every faucet in the house...I assume.
Wow. I googled Bumface's unit (Phrasing) and they are about the same price of a heat pump HWH. I can run that on solar with an interest free loan to pay for it. Hmmm.
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E=NG 
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