Rinnai® Ultra Condensing Tankless Gas Water Heater, Model: RUCS65i, 130000 Btu/hr BTU, 89 W Power, 0.26 to 6.5 gpm Flow Rate, Energy Factor: 0.85, Standby Loss: 1.3 W, Vent Size: 3 in, 4 in, Vent Type: Concentric, 2.3 A, 120 V, 60 Hz, NPT Connection, 150 psi Pressure, Energy Star Compliant: Yes, Wall Mount, Natural Gas Fuel, Ignition System: Electronic Direct, On/Off, Galvanized Steel, Sliver, Lead-Free/Contains Lead: Lead-Free, 120 to 140 deg F, 31.1 in H x 18.3 in W x 10.1 in D, Altitude: Up to 5400 ft, 3/4 in NPT Gas Supply, 3/4 in NPT Cold Water Inlet, 3/4 in NPT Hot Water Outlet, 1/2 in NPT Condensate Drain, 47 dB Sound Level