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

Navien NPE-S Series tankless water heaters

Posted by Juliet Grable

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Feb 18, 2014 4:13:00 PM


Water heaters in this series have an energy factor of 0.98, and use approximately 40 percent less energy than a 0.60 EF storage type water heater. A secondary, stainless-steel heat exchanger traps and uses condensation created from incoming cold water, which cools the hot gases inside the unit. This condensation would normally escape through the vents in a conventional tankless water heater. NPE-S Series water heaters have a maximum input of 150,000 to 199,900 BTUs per hour, and meet Ultra-Low NOx requirements.

Topics: energy efficiency, water heater, Navien, tankless water heater, condensing water heater