HOT ! Rinnai RX199iN Sensei 11.1 GPM 199,000 BTU Tankless Water Heater, NG/LP

Rinnai RX199iN Sensei 11.1 GPM 199,000 BTU Tankless Water Heater (Natural Gas / Propane)

The Rinnai RX199iN Sensei is a super high-efficiency condensing tankless water heater
designed for whole-home hot water in medium to large homes. With up to 11.1 GPM and
199,000 BTU of heating power, it delivers endless hot water for multiple showers and fixtures running
at the same time. This convertible unit can run on natural gas or propane and is approved for
indoor or outdoor installation using the Versa-Vent accessory.:contentReference[oaicite:0]{index=0}

As part of the Rinnai Sensei RX Series, the RX199iN offers up to twice the service life of a
traditional tank heater and a Uniform Energy Factor (UEF) of 0.98, helping reduce energy use and
operating costs.:contentReference[oaicite:1]{index=1}

Key Features

• 
  11.1 GPM max flow rate for high-demand households and multiple simultaneous fixtures.:contentReference[oaicite:2]{index=2}


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  199,000 BTU max input with 15,000 BTU min for wide modulation range and precise temperature control.:contentReference[oaicite:3]{index=3}


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  Super high-efficiency condensing design with 0.98 UEF and Energy Star® qualification.:contentReference[oaicite:4]{index=4}


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  Convertible fuel: runs on Natural Gas or Propane with Smart Sense gas valve technology.:contentReference[oaicite:5]{index=5}


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  Indoor or outdoor installation with optional Versa-Vent cap for outdoor mounting.:contentReference[oaicite:6]{index=6}


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  Wi-Fi and Smart Connect™ capable via Bluetooth® for app setup and diagnostics.:contentReference[oaicite:7]{index=7}


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  Recirculation-capable (Smart Circ®) when paired with a pump or internal pump kit to reduce wait times for hot water.:contentReference[oaicite:8]{index=8}


• 
  Ultra Low NOx emissions and compliant with strict air-quality standards.:contentReference[oaicite:9]{index=9}


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  Compact “suitcase-size” wall-mount design frees up floor space in mechanical rooms and garages.:contentReference[oaicite:10]{index=10}

Ideal Applications

• Whole-home hot water for medium to large single-family homes


• Homes with multiple bathrooms and high simultaneous hot-water demand


• Upgrades from 50–75 gallon tank heaters to free up space and improve efficiency


• New construction or major remodels requiring high-efficiency gas tankless solutions


• Properties needing flexibility for indoor or outdoor installation and NG/LP fuel

Performance & Efficiency

• 
  Maximum hot-water flow: up to 11.1 GPM (temperature-rise dependent).:contentReference[oaicite:11]{index=11}


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  Input range: 15,000 – 199,000 BTU/h for efficient modulation.:contentReference[oaicite:12]{index=12}


• 
  Uniform Energy Factor (UEF): 0.98 – super high efficiency, Energy Star® rated.:contentReference[oaicite:13]{index=13}


• 
  Thermal efficiency: up to 97%.:contentReference[oaicite:14]{index=14}


• 
  Temperature range: typically 98°F – 120°F standard, up to 140°F with appropriate settings.:contentReference[oaicite:15]{index=15}

Technical Specifications

Benefits for Homeowners

• 
  Endless hot water for back-to-back showers, tubs, dishwashers, and laundry.


• 
  Space-saving wall-mount design frees up valuable floor space compared to tank heaters.


• 
  Lower energy bills thanks to on-demand heating and ultra-high efficiency.


• 
  Long service life and extended warranty compared to standard tank water heaters.


• 
  Flexible installation (indoor or outdoor, NG or LP) to match jobsite conditions.

Installation Notes

• Install on a properly sized gas line, vent system, and water piping per local code and Rinnai instructions.


• Outdoor installs require the RX Series outdoor Versa-Vent cap (sold separately).


• Recirculation and Wi-Fi features require compatible accessories and proper setup.


• Professional installation by a licensed contractor is strongly recommended.

Need help matching this unit to your home or comparing it to Navien or other brands?
Contact us for sizing support, accessory recommendations, and job-specific quotes.