Noritz® Tankless Water Heater, Series: NR98, 11000 to 199900 Btu/hr Heating, Natural Gas, 3/4 in Gas Connection, Direct Electronic Ignition, Concentric Direct Vent, 3 in, 5 in Vent, 0.5 to 9.8 gpm, Energy Factor: 0.82, Copper Heating Element, Wall Hung Mount, 3/4 in Water Connection, 15 to 150 psi, 100 to 180 deg F, Ultra Low Nox: No, Indoor/Outdoor: Indoor, Beige, 23.6 in H x 13.8 in W x 9.4 in D, Commercial/Residential/Dual: Residential