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The Rinnai RU199iP is an indoor, propane-fired condensing tankless water heater rated at 199,000 BTU/h. It is the highest-capacity unit in Rinnai's SENSEI SE+ line, built for whole-home hot water in larger houses with multiple bathrooms. The condensing design recovers heat from the exhaust, which makes it more efficient than non-condensing tankless models. Against rivals like Navien's NPE-A series it is a straightforward workhorse without a built-in recirculation pump, so buyers who want instant hot water at the tap need to add Rinnai's circulation accessories.
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Owners of Rinnai SENSEI units generally report reliable endless hot water and solid build quality. Common complaints center on installation cost and the need for added recirculation to get fast hot water at distant taps.
The Rinnai RU199iP SENSEI SE+ Series is a condensing tankless water heater that runs on propane. It is designed for indoor installation and is rated at 199,000 BTU/h (199 MBH).
