Noritz adds a new residential high-efficiency, tankless water heater to its ecoTough Series lineup. The Energy Star-rated NRCC661 has an energy factor (EF) of .91 for natural gas and .93 with liquid propane, approximately 30 points higher than a standard, tank-type gas-fired water heater. The NRCC661 can deliver 6.6 gallons per minute with a maximum input of 120,000 BTU per hour, using a ½-inch gas line up to 120 feet in length.
PB Topical Ref
