Can you run two Rinnai i120cn's in paralell? — Heating

Apr 24, 2021 · There are probably better options. If you are using it for domestic heating as well, a heating only boiler and a large, well insulated indirect are probably a better option than a tankless with enough input capacity to cover your worst case instantaneously. If you are using it for dhw only, HTP makes high efficiency gas tank type water heaters.