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RBI has introduced the latest edition to its ultra-high efficiency condensing boilers and water heaters. The Infinite Energy2 (IE2) utilizes a state-of-the-art Radial Variable Circulation (RVC) stainless steel heat exchanger for maximum heat transfer and operating efficiencies of up to 98%. The units are available from 199 to 1,000 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 unit master/member configuration (8 units max). The IE2's intuitive control is Modbus based and provides auto-diagnostics of all major components and functions; including visual notification of system errors and lockouts through continuous monitoring of temperature sensors, fan speed rotation, and other application operating sequences. Back-lit visual readouts include water flow sensor, supply temperature, flue temperature, and tank temperature for immediate system feedback.