The ecoTough™ Series of gas-fired residential condensing tankless water heaters has been expanded with the NRC83, an Energy Star®-rated unit designed for smaller homes and multifamily dwellings. Available in both indoor (the two-pipe, direct vent NRC83-DV) and outdoor (NRC83-0D) models, the new wall-mounted units have an energy factor (EF) of 0.92 for natural gas and 0.94 with liquid propane.
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