1 or 2 heat-pump water heaters?
I have a two unit building and will be purchasing heat pump hot water heaters and placing them in the cellar. Each unit will likely have 2 occupants. I am deciding between buying a single 80 gallon Stiebel Eltron Accelera 300 (to share between both units) or two 50 gallon GE Geospring hot water heater (one for each unit). I was wondering if anyone had any thoughts on the best direction to go on this. Here are the points I am considering. Feedback on any of these points is welcome.
1) Overall energy efficiency. I believe the 80 gallon is more efficient. It would take less power to heat one big tank than two smaller ones.
2) Human usage factor. When the tenant does not pay for hot water use, does it have a big effect on consumption?
3) Proximity of tank to fixtures. Separate tanks allows me to put one tank about 20 feet closer to the fixture of one unit. The other unit would be unchanged.
4) Brand reliability. I am reading mixed reviews about the Geospring. Stiebel seems to have a better reputation and longer track record making these things.
Posted Wed, 01/01/2014 - 23:46
Edited Thu, 01/02/2014 - 06:37
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