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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

Specifications

Dimensions Product Width (inches): 14.76
Product Height (inches): 33.86
Product Depth (inches): 22.05
Mobile Home Certified Yes
Product Weight (lbs) 74.1
Wi-Fi Capable Yes
Energy Factor 0.93
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 Propane
Hot Water Outlet Connection 3/4" MNPT 19mm
Isolation Valves Included Yes
Manufacturer Model Number REU-N3237FF-US-N
Maximum BTU 199,000 BTU/h
Minimum BTU 15,000 BTU
Maximum Altitude 10,200'
NOx Level 150 PSI 1035 KPa
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.


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Mobile Home Certified Yes
Product Weight (lbs) 74.1
Wi-Fi Capable Yes
Energy Factor 0.93
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 Propane
Hot Water Outlet Connection 3/4" MNPT 19mm
Isolation Valves Included Yes
Manufacturer Model Number REU-N3237FF-US-N
Maximum BTU 199,000 BTU/h
Minimum BTU 15,000 BTU
Maximum Altitude 10,200'
NOx Level 150 PSI 1035 KPa
Commercial Warranty (Years) Heat Exchanger: 8, Labor: 1, Parts: 5
Residential Warranty (Years) Heat Exchanger: 15, Labor: 1, Parts: 5

Product Height
27.9 in / (709 mm)
Product Width
18.5 in / (470 mm)
Product Depth
12.0 in / (305 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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