KD Navien® Tankless Water Heater, Series: NPE-A, 199900 Btu/hr Heating, Liquid Propane/Natural Gas Fuel, 3/4 in NPT Gas Connection, Electronic Ignition, Forced Draft Direct Vent, 2 in, 3 in Vent, Condensing Condensing/Non Condensing, 11.2 gpm Flow Rate, 0.96, Stainless Steel Heating Element, Wall-Hung Mounting, 3/4 in NPT Water Connection, 8 to 13 in WC Gas/15 to 150 psi Water Pressure, No Ultra Low NOx, Cold Rolled Carbon Steel, Indoor/Outdoor Indoor/Outdoor, 17.3 in W x 13.2 in D x 27.4 in H Dimensions, Commercial/Residential