RU98e (REU-KB3237WD-US)

Ultra Series Tankless Water Heater

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RU98e (REU-KB3237WD-US)
  • ENERGY STAR® Qualified
  • Energy Factor of .95 for Natural Gas and Propane
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort (see brochure for more details)
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • 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
  • Multiple venting options available including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor allow for an easy installation

RU98e (REU-KB3237WD-US) Gallery

What is a Rinnai Tankless Water Heater
What is a Rinnai Tankless Water Heater
Why Go Tankless Over a Tank Water Heater
Why Go Tankless Over a Tank Water Heater
Tankless Water Heaters are a Smart Investment
Tankless Water Heaters are a Smart Investment
Dimensions

Width: 18.5 Inches (469.9 mm)

Height: 26 Inches (660.4 mm)

Depth: 10 Inches (254 mm)

Weight

61.7 lbs (28.0 kg)

Installation Type

​Outdoor

Minimum/Maximum BTU

15,200 / 199,000 Natural Gas and Propane

Energy Factor

0.95 for Natural Gas and Propane

Temperature Range

Residential: 98°F - 140°F (37°C - 60°C)

Commercial: 98°F - 185°F (37°C - 85°C)**

Minimum Activation Rate

0.4 gpm (1.5 lpm)

Flow Rate (70° / 50° Temp. Rise)

​5.5 / 7.7 gpm (20.8 / 29.2 lpm)

Hot Water Flow Rate Range

0.26 - 9.8 gpm (0.98 - 37.1 lpm)

Controllers

Included: MC-91-2US

Optional: MC-195T-US, MC-100V-1US, BC-100V-1US, MCC-91-2US

Ultra Lox NOx

Yes

Warranty (Residential)*

Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor)

Warranty (Commercial)*

Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)

Mobile Home Certified

Yes

Valves Shipped in Box

​Yes

High Altitude Approved

​Up to 10,200 ft. (3,109 m)

Certifications

​AHRI, CSA, Energy Star®

Venting Options

​N/A

Tankless Rack System (TRS/TRW) Compatible

​Yes

1/2" Gas Line Compatible***

​Yes

* For complete information and details regarding Rinnai’s warranty, please visit rinnai.us.
*** See page 23 in this brochure for complete installation parameters. For complete information on gas sizing for Rinnai Tankless For complete information on gas sizing for Rinnai Tankless Water Heaters, consult the Operation and Installation Manual.

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