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Rinnai’s Ultra Series condensing water heater combines the traditional tankless water heater with more energy savings for commercial applications. The Ultra Series incorporates two heat exchangers to achieve value from every cubic foot of natural gas or propane. Units include built-in Rinnai Circ-Logic for optimal efficiency; a temperature-lock function that prevents accidental or unauthorized changes to water temperature; and a Scale Detection System for lime-scale buildup and alerting users when maintenance is needed.
