The ENERGY STAR rated NRC661, Noritz’s 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. With a maximum input of 120,000 BTU per hour (BTUh), using a half-inch gas line up to 120 feet in length.
Heat Exchanger Warranty (w/out Recirculation) 12 Years
Heat Exchanger Warranty (w/Recirculation) 3 Years
Parts Warranty 5 Years
Labor Warranty 1 Year
For detailed warranty terms and conditions please refer to the Noritz warranty page