Bradford White® Tankless Gas Water Heater, Series: Infiniti® K Series, 9000 to 199000 Btu/hr Heating, Natural Gas Fuel, 3/4 in Gas Connection, Electronic Ignition, Concentric Direct Vent, 2 in Vent, Condensing Condensing/Non Condensing, 5.2 gpm at 75 deg F Rise Flow Rate, 100 % Recovery Rate, 0.96, Wall Hung Mounting, 3/4 in NPT Water Connection, 18 to 150 psi Pressure, 100 to 140 deg F, Yes Ultra Low NOx, Indoor Indoor/Outdoor, 18-19/32 in W x 9-27/32 in D x 31-1/2 in H, Residential, Domestic