RBI’s Infinite Energy2 utilizes a radial variable circulation stainless-steel heat exchanger and is available from 199 to 1000 MBH and up to 20:1 single-unit firing rate modulation. Units are PVC, polypropylene and stainless-steel vent capable and can be installed in a multiple (8 max) unit master/member configuration. The units are Modbus-based and provide auto-diagnostics of all major components and functions, including visual notification of system errors and lockouts through continuous monitoring of application operating sequences. Back-lit visual readouts include water-flow sensor and supply, flue and tank temperature for immediate system feedback.RBI.