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Replaces model C199ep.



Spec Sheet  Install Manual

With an enhanced combustion design, the Rinnai SENSEI Tankless Water Heater provides a better experience for both users and installers. Like all Rinnai Tankless Water Heaters, it's also vertically integrated. That means all key components are manufactured by Rinnai — to ensure Rinnai quality.

Condensing Technology for Colder Climates

The Rinnai SENSEI offers freeze protection down to -4o F (for outdoor units) or -22o F (for indoor units) through:

  • NEW integrated check valve that prevents backflow from outside cold air
  • NEW Fiber Mesh Premix Burner
  • Integrated logic to temporarily activate the unit in extreme cold climates

Most Flexible Venting in the Industry

The Rinnai® Sensei™ can go in an old condensing vent system for replacement if needed, but new installs can use smaller, lighter, less expensive concentric venting.

Now Including 2" Venting Options

Specifications

Dimensions Product Width (inches): 14.76
Product Height (inches): 33.86
Product Depth (inches): 22.05
Mobile Home Certified Yes
Product Weight (lbs)

72.3

Wi-Fi Capable Yes
Energy Star Certified Yes
Circ-Logic Compatible (S/N - Production Date) Yes
Recirculation Capable Yes
Recirculation Pump

No

Cold Water Inlet Connection 3/4" MNPT/19mm
Domestic Hot Water Temperature Range (Standard) (°F/°C) 98F-120F / 37C-49C
Domestic Hot Water Temperature Range (Optional) (°F/°C) 98F-185F / 37C-85C
Gas Supply Connection 3/4" MNPT/19mm
Gas Type
Hot Water Outlet Connection 3/4" MNPT/19mm
Isolation Valves Included Yes
Manufacturer Model Number REU-N3237WC-US-P
Maximum BTU 199,000 BTU/h
Minimum BTU

15,000 BTU/h

Maximum Altitude 10,200'
NOx Level Less Than 14Ng/J (20ppm)
Commercial Warranty (Years) Heat Exchanger: 8, Labor: 1, Parts: 5
Residential Warranty (Years) Heat Exchanger: 15, Labor: 1, Parts: 5


* It is recommended that a trained and qualified professional who has attended a Rinnai training class complete the installation. The warranty may be voided due to any improper installation.

— Installation and service must be performed by a licensed professional.

 

Related Articles:

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Properly Sizing a Tankless Water Heater

Why Every Home Needs a Wireless Controller for their Tankless Water Heater

5 Powerful Benefits of Upgrading to a Rinnai Tankless Water Heater

Rinnai Tankless Water Heaters

Rinnai Error Codes and Troubleshooting Tips

How Tankless Water Heaters Work

Mobile Home Certified Yes
Product Weight (lbs)
72.3

Wi-Fi Capable Yes
Energy Star Certified Yes
Circ-Logic Compatible (S/N - Production Date) Yes
Recirculation Capable Yes
Recirculation Pump
No

Cold Water Inlet Connection 3/4" MNPT/19mm
Domestic Hot Water Temperature Range (Standard) (°F/°C) 98F-120F / 37C-49C
Domestic Hot Water Temperature Range (Optional) (°F/°C) 98F-185F / 37C-85C
Gas Supply Connection 3/4" MNPT/19mm
Gas Type
Hot Water Outlet Connection 3/4" MNPT/19mm
Isolation Valves Included Yes
Manufacturer Model Number REU-N3237WC-US-P
Maximum BTU 199,000 BTU/h
Minimum BTU
15,000 BTU/h

Maximum Altitude 10,200'
NOx Level Less Than 14Ng/J (20ppm)
Commercial Warranty (Years) Heat Exchanger: 8, Labor: 1, Parts: 5
Residential Warranty (Years) Heat Exchanger: 15, Labor: 1, Parts: 5

Product Height
31.3 in / (795 mm)
Product Width
18.5 in / (470 mm)
Product Depth
11.45 in / (290 mm)
Product Weight
64 lb / (29 kg)
Shipping Depth (inches/mm)
33.1 in / (841 mm)
Shipping Height (inches/mm)
33.1 in / (841 mm)
Shipping Width (inches/mm)
21.7 in / (551 mm)
Shipping Weight (lbs/kg)
73 lb / (33 kg)

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