Rheem® Tankless Gas Water Heater, Series: RTGH Series, 11000 to 157000 Btu/hr, 85 W, 8.4 gpm, 0.93 Energy Factor, 3.5 W Standby Loss, 2 in, 3 in Vent Size, Concentric Vent, 0.7 A, 120 V, 60 Hz, NPT Connection Type, 150 psi, Propane Gas, Copper/Stainless Steel, Lead-Free/Contains Lead: Lead-Free, 100 to 140 deg F, 23.7 in H x 17.7 in W x 9.8 in D, 7800 ft Altitude, Additional Information: 3/4 in NPT Gas Connection, 3/4 in NPT Hot Water Connection, 3/4 in NPT Cold Water Connection, 1/2 in NPT Condensate Connection