Noritz® Tankless Water Heater, High Efficiency, Series: NRC98, 180000 Btu/hr Heating, Natural Gas Fuel, 3/4 in Gas Connection, Direct Electronic Ignition, Direct Vent, 3 in, 4 in Vent, Condensing Condensing/Non Condensing, 0.5 to 9.8 gpm Flow Rate, 0.9, Copper/Stainless Steel Heating Element, Wall-Hung Mounting, 3/4 in Water Connection, 15 to 150 psi Pressure, 100 to 140 deg F, No Ultra Low NOx, Indoor Indoor/Outdoor, Beige, 24.2 in H x 18.3 in W x 9.4 in D Dimensions, Residential