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Rinnai SENSEI SE+ Series 18" 199k BTU 11 GPM Gas Tankless Water Heater

Rinnai SENSEI SE+ Series 18" 199k BTU 11 GPM Gas Tankless Water Heater

Regular price $2,473.00
Regular price Sale price $2,473.00
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Installation Type
Fuel Type
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Rinnai is raising the bar in tankless heating technology with their SENSEI™ tankless water heaters. Rinnai's SENSEI™ series provides a better experience for both users and installers alike with simple installation, serviceability, efficient performance, and flexible venting options. The SENSEI's™ advanced condensing technology can easily adapt to colder climates with freeze protection down to -4° F for outdoor units. A corrosion-resistant stainless steel heat exchanger, integrated check valve and included safety devices allow for powerful and efficient water heating for years to come.

Benefits of a Tankless Hot Water Heater:

  • Endless hot water - Heats water as it goes through the pipes, offering endless hot water for your home (or business)

  • Hot water on demand - Once you turn the water on, hot water runs through your pipes and out the faucet! Virtually no time or water is wasted waiting for the water to heat up

  • Highly Efficient - Gallon for gallon, you will spend less money heating your hot water. With a tankless system, the water is heated on demand rather than sitting in a storage tank. A storage tank typically heats the water intermittently throughout the day and night not only when it is needed. This unit is Energy Star Qualified and features an Energy Factor of 0.96 (the closer to 1.0 the better)

  • Long-lasting - Unlike a storage tank in which the water sits in the tank all the time creating sediment and rust, a tankless water heater will last longer

  • EZ Connect - Allows for connection of two units together


  • Professional installation recommended, Rinnai for assistance
  • Energy Star qualified with a uniform energy factor of .93
  • Equipped with Rinnai Circ-Logic™ - pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation (not included)
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures
  • Save energy and reduce utility costs by operating only when hot water is needed
  • Temperature lock function prevents accidental or unauthorized changes to water temperature
  • Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels
  • Every SENSEI™ water heater is Wi-Fi compatible for remote monitoring and management.
  • The Rinnai SENSEI™ series water heaters feature a fiber mesh premix burner that provides an even flame distribution for optimal performance and efficiency.
  • The included stainless steel heat exchanger features corrosion-resistant properties to ensure reliable and long-lasting operation, while its superior efficiency puts the SENSEI™ series at the top of its class.
  • Perfect for both new installs and retrofits, the SENSEI™ features the most flexible venting in the industry. Whether your install requires concentric, direct, room air, or common venting, the SENSEI™ series can handle it all.
  • The SENSEI™ water heater features an adjustable mounting plate and a rotatable pressure relief valve to accommodate a variety of install applications.
  • An easily accessible parameter adjustment allows for fast and simple servicing.
  • Enables easy preventative maintenance, annual flushing, and serviceability.

Safety Features:

  • Flame failure - flame rod
  • Boiling protection
  • Combustion fan RPM check
  • Overcurrent - glass fuse
  • Remaining flame (OHS)
  • Automatic frost protection


Manufacturer Trade Model Number RU199iN, RU199iP, RU199eN, RU199eP
Product Depth 11.45 in / (290 mm)
Product Height 31.3 in / (795 mm)
Product Width 18.5 in / (470 mm)
Product Weight 64 lb / (29 kg)
Gas Type Natural Gas/Propane
Installation Type Indoor/Outdoor
Recirculation Capable Yes
Residential Energy Star Yes
Uniform Energy Factor 0.93
Energy Factor 0.96
Domestic Hot Water Flow Rate (Maximum) 11 GPM / (41.6 l/min)
Wi-Fi Capable Yes
SCAQMD Approved Ultra-Low NOx


To connect with a Rinnai-trained installer, you can utilize the Rinnai Dealer Locator by visiting the link: Alternatively, you can directly reach out to Rinnai's dedicated customer support team via the Toll-Free Number: 1 (800) 621-9419.

Options and Accessories

3" Control-R Wi-Fi Module for Tankless Water Heaters

  • Works with all Rinnai Tankless Water Heater models manufactured 2006 and newer (except RH180 Hybrid Tank-Tankless WaterHeaters).
  • The Lime Condition (LC) notification will not appear in the Rinnai
  • App, when the Control-R™ Wi-Fi Module is paired with the following series of Rinnai Tankless Water Heaters, manufactured prior to 2009: VA, VB, KA, and V53e.

9" Grundfos Pump and Timer Kit with Flange for Circ Logic

  • For use with Rinnai Circ-Logic™ enabled tankless water heaters
  • Built-in Economy and Comfort modes allow you to customize the energy use and power to suit your needs
  • Indicates that a hot water tap is open and that control of the temperature is taken at another controller

21" Pipe Cover for Sensei SE+ Series Installation

  • SE+ pipe enclosure SE+ models (silver)
  • Pipe cover mounts to the underside of Tankless water heaters
  • Water heater accessory
  • Supports Condensing models

12" / 21" Condensing Horizontal Termination Kit for Rinnai SE and SE+ Tankless Water Heaters

  • For Indoor Installation
  • It is for use with Rinnai RU and RUR  series tankless hot water heaters. 
  • All RU and RUR indoor tankless water heaters must be vented to the outdoors using concentric piping

2" x 39" Plastic Condensing Vent Pipe Extension Kit

  • For Indoor Installation
  • For use with Sensei Se+ tankless water heaters (condensing) and m-series boilers
  • Concentric venting reduces install time and costs
    Water heater accessories

Documents & Files


Residential Warranty:

15 yrs on Heat Exchanger
5 Year Warranty on Parts

1 Year Labor Warranty

Commercial Warranty:

8 yrs on Heat Exchanger
5 Year Warranty on Parts

1 Year Labor Warranty


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