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50 Eco-Friendly Products Selected by Green Builder's Editors

Noritz NRC661 tankless water heater

Posted by Juliet Grable

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Feb 18, 2014 4:22:00 PM

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This condensing type water heater captures heat from the exhaust gas, and uses it to preheat incoming cold water as it passes through the secondary heat exchanger. It operates with an Energy Factor of 0.91 for natural gas, and 0.93 for LP—ratings nearly ten points higher than a comparably sized, conventional tankless unit, and approximately 30 points higher than a standard, tank-type gas-fired water heater. The NRC661 uses recyclable components and replaceable parts, and the heat exchanger comes with a 12-year warranty.

Topics: Noritz, water heater, condensing water heater