Ultra High Efficiency Condensing Tankless Low Nox Natural Gas Water Heaters, Type: Outdoor, Gas Type: Natural, Max BTU Input: 157,000BTU/Hr, Minimum BTU Input: 11,000, Recovery Rating:178 Gallons/Hr, Max Working Pressure: 150Psi, Voltage:120, Hertz:60, Phase:1, Less Than 2 Amps, Efficiency: 92, Water Connection Size: 3/4", Gas Connection Size:3/4",Max Inlet Gas Pressure: 10.5 "W.C., Min. Inlet Gas Pressure: 4.0"W.C., Dims: 27-1/2"H X 18-1/2"W X 9-3/4"D, Weight: 65 Lbs, Origin: Japan **For Outdoor Installation Only** **Not For Installation In A Manufactured (Mobile Home)** Ships Via LTL Freight And Does Not Qualify For Free Ground Shipping