I just had a pretty cool condensing boiler installed. It even has a captive indirect hot water tank to get you started. It's a Rinnai QP130N. It's an old house but only 1650 s.f. and well insulated. It does heat the house and the hot water just fine. But I think I needed something about half that size. Why he didn't recommend the smaller QP85N or some other unit is beyond me. Now I have to pay for all that extra gas which obviates the savings of going to a condensing unit in the first place. Argh!!!!!
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