The Prestige Series Condensing Tankless Water Heater harnesses condensing technology to achieve a 0.94 EF, and it is ENERGY STAR-qualified. It is installed with intelligent electronic controls to increase energy efficiency, and a self-diagnosis system for faster, easier and smarter installation. Available in outdoor and indoor models for multiple installation options. The unit employs an industry-best minimum flow rate of 0.26 GPM and a minimum activation flow rate of 0.40 GPM, so homeowners using low-flow fixtures receive hot water without having to increase the flow, which cuts down on water usage and energy costs. 

Manufacturer Name: Rheem