Rinnai’s new gas-powered RC80HPe tankless water heater puts a welcome emphasis on durability. Electric water heaters have a lifespan of 10 years or less, but this unit comes with a 12-year warranty on the heat exchanger. The Energy Star unit is up to 95% efficient, and can heat up to 8 gpm of water indefinitely (with a 35 degree rise), so it can supply multiple showers.
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