2018 Rinnai Tankless • RU Series (Super-High Efficiency Plus Condensing): • Included popular models like the RU98 (such as the indoor RU98iN) and RU199 variants. • Delivered up to 0.95 Uniform Energy Factor (UEF) efficiency. • Supported heavy hot water demands (simultaneous supply to multiple baths/fixtures). • RUR Series (Condensing with Integrated Recirculation Pump): • Included models like the RUR98iN (indoor) and RUR98eN (outdoor). • Featured built-in pumps and Circ-Logic technology for faster hot water delivery at the tap. • RL / V Series (High-Efficiency Non-Condensing): • Included workhorse models like the RL94 and V98 series. • Designed for standard residential installations requiring traditional non-condensing venting configurations.