Indirect domestic hot water options
A couple of questions about indirect hot water systems.
1) What savings do folks see over common direct fired water heaters? I'm especially interested in if anyone has experience or can point to a case study for multifamily buildings. I can't find any research online on this, and I'd really like a decent reference.
2) Any thoughts on the relative longevity and efficiency of 1) package indirect systems (i.e. Rheem Spider) vs. 2) stand alone boiler with indirect tank with integral HX, vs. 3) stand alone boiler, stand alone heat exchanger, and storage tank? I like the modular approach of #3 given that tanks oxidize and wear out, but wonder if anyone has any experience. For multifamily use, common indirect tanks only have 5 yr warranty. Tradeoff for #3 is the second pump.
Posted Tue, 02/26/2013 - 21:32
Edited Sun, 03/03/2013 - 07:29
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