Unmatched Energy Efficiency: The Rinnai I-SERIES Plus Boiler achieves up to a 96% AFUE, providing significant energy savings and lowering operational costs for professionals in demanding applications Smart Home Compatibility: Equipped with Smart Connect technology, this boiler offers Wi-Fi remote access and Bluetooth connectivity through the Rinnai Central App, allowing users to monitor and manage their system conveniently from anywhere Versatile Fuel Options: Featuring Smart Sense Adaptive Gas Valve technology, the I-SERIES Plus efficiently operates with either natural gas or propane, ensuring compatibility to meet various heating requirements Compact and Installation-Friendly Design: With 2-inch venting capabilities up to 75 feet, the I-SERIES Plus enables faster and easier installation compared to traditional models, facilitating setup in any setting Enhanced Performance Features: This boiler includes 4 built-in zones for optimized heating, advanced controls with a quick setup screen, and high-altitude approval up to 10,100 feet, ensuring reliable performance in diverse environments