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The Rinnai RX199iN Sensei is a condensing tankless water heater rated at 199,000 BTU and up to 11.1 GPM, enough to run several hot-water fixtures at once. It runs on natural gas and can be converted to propane, and it is approved for indoor or outdoor wall mounting. Condensing operation recovers heat from the exhaust, so it uses less gas than a non-condensing tankless unit and far less than a storage tank. It suits larger homes and light commercial use with heavy simultaneous demand; smaller households get little benefit from the extra capacity.
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Owners of Rinnai condensing tankless units generally report steady hot water for multiple fixtures and lower gas use than their old tanks. Complaints center on installation cost and complexity and on the maintenance hard water demands.
The Rinnai RX199iN Sensei is a condensing tankless water heater for residential and light commercial use. It delivers up to 11.1 GPM with a 199,000 BTU input, supplying hot water to multiple fixtures at the same time.
It runs on natural gas and can be converted to propane. It is approved for indoor or outdoor installation. The unit has a compact, wall-mounted design.
Condensing technology provides high efficiency and lower gas usage. It suits new installations and replacements.
