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Product Review from Environmental Building News
June 1, 2009
Navien Condensing Tankless Water Heaters
Navien America, a subsidiary of the South Korean company Kyung Dyong Navien, is now manufacturing the most efficient tankless water heaters in the industry. These Energy Star-rated water heaters achieve energy factors (EFs) as high as 0.98 by using conventional and condensing heat exchangers to capture heat from flue gases as well as latent heat generated when water vapor in these gases condenses into liquid. Adding to the units’ efficiency are dual microprocessors that use data from air and gas pressure sensors to ensure a proper fuel-to-oxygen ratio for optimum combustion, even when there are long vent runs or fluctuating gas pressure....
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