Digital-Flo® is an instantaneous water heater that heats on demand and stores very little hot water. Digital-Flo® transfers heat from steam to cold water and then precisely blends hot water, cold water, and recirc return water to a programmable mixed water outlet setpoint. Digital-Flo® water heaters utilize digital technology to monitor the hot water inlet, the cold water/recirc return inlet, and the mixed water outlet. Digital-Flo® is supplied pre-piped and pressure tested with a Digital Recirculating Valve (The Brain® - Models DRV40, DRV50, and DRV80).