Reliance 0 Gal 160,000 BTU Propane Tankless Water Heater

15 year warranty heat exchanger, 5 year warranty parts, 97% UED recovery efficiency, .94 Uniform Energy Factor (UEF), condensing outdoor model, meets California Ultra Low NOx emission rules, requires 3/4″ gas line,150 psi Pressure only relief valve not included-purchased separately, recommend ordering isolation valve kit that includes the 150 psi pressure only valve, and two service valves, which makes required periodic maintenance easier, order 4699856 separately, up to 6,000 feet altitude, requires 120 volt power supply, Remote controller is NOT waterproof, do not extend remote control wiring more than 400 feet, warranty will not cover damage caused by water quality, Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvementStated Warranty time period applies only to original owner and when installed in accordance with installation manual applicationtankless propane gas water heater outdoor installation onlyCondensing model for outdoors only.160000 Input BTU maximum, 13000 Input BTU minimum.Maximum 6.6 GPM at 35-45 degreeF temp. rise, 4.3 GPM at 70 degreeF temp. rise.OUTDOOR Install OnlyAll descriptions, images, references, features, content, specifications, and product described or depicted are subject to change at any time without notice.Not approved for mobile or manufactured-home installation; Will void warranty if installed in manufactured or mobile-home