What is the newest Rinnai tankless water heater as of 2024 to 2026 is the Rinnai RX and RXP series and the Rinnai SENSEI series, which are latest high-efficiency tankless models with smart features. Rinnai Corporation, founded in 1920 in Nagoya, Japan, headquartered in Nagoya, Japan, with factory in Griffin, Georgia, USA, introduced Rinnai RX series in 2023 to 2024, which is ultra-low NOx, high-efficiency tankless water heater with 0.93 to 0.98 UEF, WiFi connectivity via Rinnai Central app, and recirculation option, costing $1500 to $2500. The Rinnai SENSEI series, introduced in 2024, is latest premium tankless with built-in recirculation, smart features, and high efficiency, costing $1800 to $3000, designed for easy installation and compact size. Rinnai also has RSC series with recirculation. The newest Rinnai tankless water heater features include smart WiFi, voice control, leak detection, and high efficiency, with 12-year heat exchanger warranty. Rinnai continues to innovate with condensing technology. So newest Rinnai tankless water heater is Rinnai RX and SENSEI series, introduced 2023 to 2024, with high efficiency 0.93 to 0.98 UEF, WiFi smart features, recirculation, ultra-low NOx, costing $1500 to $3000, latest models from Rinnai, Japanese brand, made in Japan and USA, with advanced features for 2026.
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