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The Rinnai RE199iN is a high-efficiency, non-condensing tankless water heater for indoor residential use. It is a gas-fired unit rated up to 199,000 BTU, which makes it one of Rinnai's highest-capacity residential models, sized for large homes with several bathrooms running at once. Unlike condensing units, it vents through standard Category III stainless steel pipe rather than PVC, and it does not produce acidic condensate, so no neutralizer is needed. Against condensing rivals it gives up some efficiency, but it delivers strong hot-water output and simpler venting and installation.
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Owners of Rinnai high-output non-condensing units generally report steady hot water across multiple fixtures and few service issues. Complaints center on installation cost, especially stainless venting and gas line sizing, and on the efficiency gap versus condensing models.
The Rinnai RE199iN is a tankless water heater from the Re Model Series. It has a non-condensing design and is described as high efficiency in the product name.
It is factory-new Rinnai equipment and comes with the full Rinnai manufacturer warranty.
