Thought I would offer an up-date. I'm visiting the parents and checked up on the DIY HPWH. Its been purring away in the basement for more than a year.
Some of the data I'm checking. These are real world numbers. The refrigerant is BBQ propane or R290 its suction side is 18 psi the kill-o-watt is indicating 415 watts and after a month running hot water for the parents works out to 118 KWH per month. Using the cost of energy here in Ontario Canada it works out to $23.00/ month.
Heck that's what they paid for rental on the propane fired unit they had. They are saving a pile of money. No propane being burned there.!!
Randen
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