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The Rinnai RE140iN is an indoor, non-condensing natural gas tankless water heater with a 140,000 BTU maximum input and 0.4 to 5.3 GPM flow. It modulates down to 10,400 BTU, so it throttles back for small draws instead of cycling on and off. Its 0.81 uniform energy factor is decent for a non-condensing unit but below the 0.90-plus condensing models Rinnai also sells. It suits small to medium homes with one or two bathrooms running hot water at a time.
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Owners of Rinnai's non-condensing indoor units generally report steady hot water and few service calls, though some find the output limiting when several fixtures run together.
The Rinnai RE140iN is a non-condensing tankless water heater for indoor installation. It runs on natural gas and has a maximum output of 140,000 BTU. Its compact design suits small spaces.
It is made for residential use and has a uniform energy factor of 0.81. It is Wi-Fi capable for remote management and has improved gas conversion efficiency.
