The Rinnai system is a comprehensive solution that takes advantage of the tankless water heater’s efficiency and flexibility. Use the efficiencies of your Rinnai tankless water heater to heat your home. Utilize controllers to set precise water temperatures, for multiple locations in your home. This ensures comfort and prevents scalding accidents. Further, our unique concentric venting system, for units installed inside the home, only requires one penetration for both intake and exhaust. This proprietary vent pipe takes the guess work out of using the proper materials, maximizing safety and space usage.