2022 Rinnai Tankless SENSEI RX Series (Condensing) The RX series represents Rinnai's high-efficiency platform launched around mid-2022, featuring up to 0.98 Uniform Energy Factor (UEF) efficiency. • RX Models (RX130, RX160, RX180, RX199): Standard high-efficiency condensing units ranging from 130,000 to 199,000 BTU, delivering up to 11.1 GPM capacity. Features Smart Sense gas control (automatic natural gas/propane adaptability) and Versa Vent for flexible indoor/outdoor installation. • RXP Models (RXP160, RXP199): Condensing units equipped with built-in pumps and Smart-Circ intelligent recirculation for instant hot water availability. Other Core 2022 Lineups Rinnai continued supporting specialized configurations alongside the new RX launch: • RUS & RUCS Series: Mid-to-high tier condensing models offering UEF ratings of 0.90 (RUS) and 0.85 (RUCS). • RSC / RUR Series: Units featuring integrated recirculation logic and smart-home integration (such as Amazon Alexa compatibility). • RE / REP Series: Non-condensing gas tankless alternatives with UEF ratings around 0.81 to 0.82, suited for smaller setups