Rinnai Re180in 180k BTU 8.5 GPM Natural Gas Tankless Water Heater

Rinnai Re180in 180k BTU 8.5 Gpm Natural Gas Tankless Water Heater Professional Installation Required Uniform Energy Factor Of 0.82 Includes A Built-In Recirculation Pump, Smart-Circ Intelligent Recirculation That Learns Your Water Usage Patterns To Provide Hot Water According To Your Schedule, Thermal Bypass Valve Included - Ideal For Homes Without A Dedicated Return Line Save Time With Hot Water Whenever And Wherever You Need It, Any Size Home, Even For Simultaneous Uses At Multiple Fixtures Save Energy And Reduce Utility Costs By Operating Only When Hot Water Is Needed Maximum Output, Minimum Space, Suitable For Installation In Non-Traditional Spaces Such As Crawl Spaces And Attics Multiple Venting Options Available Including Pvc/Cpvc Using The Ubbink Concentric To Twin Pipe Adaptor Allow For An Easy Installation Wi-Fi Ready, Requires Control-R Module Residential Warranty: Limited 15-Year On Heat Exchanger, 5-Year On Parts, 1-Year On Labor, Commercial Warranty: Limited 8-Year Or 12,000 Hrs. On Heat Exchanger, 5-Year On Parts, 1-Year On Labor Uses 3 X 5 Concentric Venting MFG# RE180iN