Rinnai launched the first and only non-condensing unit with a built-in pump, featuring Smart-Circ Intelligent Recirculation, its RE Series tankless water heaters. The RE Series features Rinnai’s latest innovative Smart-Circ Intelligent Recirculation. This technology learns a user’s hot water usage patterns over seven days, then schedules the built-in pump and times recirculation patterns accordingly. Users enjoy hot water during regular demand periods while saving energy and money. The RE Series is also available with the control•r Wi-Fi module, to achieve scheduled recirculation or on-demand operations if that is desired.