Additional InformationADA Compliant|AHRI Certified|CSA Certified|NSF Certified|SCAQMD Low NOx Approved|UPC Certified
Marketing InformationThe ENERGY STAR® Certified NRC661, Noritz® efficient condensing model with a half inch gas line. Featuring the same energy saving condensing technology as the rest of the Noritz® eco-TOUGH™ Series of gas fired residential tankless water heaters, the NRC661 has an energy factor of 0.89 for NG and LP models. These ratings are nearly 10-points higher than that of a comparably sized, conventional tankless unit and approximately 30-points higher than a standard, tank-type gas fired water heater.