Energy and Space Efficient Tankless Hot Water Heater: Our commercial hot water heaters feature a space-saving design that conserves energy as it heats only when necessary; Multiple venting options offer installation flexibility Optimal Water Pressure: This tankless water heater offers a high-performance 9 GPM hot water flow rate for the powerful, constant stream your business needs Smart, Reliable Heating: Rinnai Tankless Water Heaters feature Circ-Logic technology, which enables recirculation patterns that coincide with your typical habits; Wi-Fi monitoring creates hot water on demand Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your water heater; We do not recommend installing this appliance without a technician Guaranteed to Last: 8-, 5-, and 1-year commercial warranty for heat exchanger, parts, and labor, respectively