Space-Saving Tankless Gas Water Heater. Condensing Compact, Electric Ignition, No Standing Pilot, Requires 120V/60HZ,Copper Primary Heat Exchanger, Stainless Steel Secondary Heat Exchanger to protect against corrosion, Built-IN Temperature Controller and Advanced Diagnostics to Simplify Troubleshooting, Factory Installed Power Cord, Exhaust 3” PVC and ABS Pipe intake and Exhaust, Internal Freeze Protection System, Category 111 Stainless Steel Venting can also be used, Ultra-Low NOx, Complies with California SCAQMD Rule 1146.2 and other Air Quality Management Districts, Complies with Lead Free Standards, Energy Star Qualified, .93 Energy Factor, 12 Year Limited Warranty on Heat Exchanger in Residential Applications, , 5 Year Limited Warranty on all parts. Unit Dimensions 14”W X 213/4”H X91/4” Depth. ” Gas Line Connection, Water Line Connections, Natural Gas Input 15,000- 120,000 Operating Range, 1 Shower Cooler Climates, 2 Shower Warmer Climates.