We have a the Rinnai solo boiler I90SN. When we purchased our house, it came with the set up and unit. It currently provides heat and hot water - when the unit is down, Rinnai's parts always seem to be on back order!! Don't recommend one unit for both heat and hot water as a set up as. We are currently waiting for the water pressure sensor, unit is down and may be up to 2 weeks....to source part.
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