RC98e (REU-KA3237WD-US)

Ultra Series Tankless Water Heater

Get a Quote

Want more information? Let's connect you with the three Rinnai dealers nearest you.

RC98e (REU-KA3237WD-US) click to zoom into photo of
RC98e (REU-KA3237WD-US)

ENERGY STAR® Qualified
Condensing Technology for Greater Efficiency and Significant Energy Savings
Up to 95% Thermal Efficiency
Pre-set at 120°F
Natural Gas and Propane Models Available
Meets California and Texas NOx Emissions Standards
Energy Factor of 0.93 for Both Gas Types
Compatible with Full Line of Rinnai Digital Controllers
Temperature Range with Controllers: Residential (98°F - 140°F) Commercial (98°F - 185°F )
12-Year Warranty on Heat Exchanger, 5 Year Parts, 1 Year Labor for Residential Installations


Width: 18.5 Inches

Height: 26.4 Inches

Depth: 10.7 Inches


71 Pounds


Outdoor, Residential and Commercial

Hot Water Capacity

0.4 to 7.6 GPM (50° F rise) and 0.4 to 9.8 GPM (35° F rise)

Approved Gas Types

Natural Gas or Propane

Minimum/Maximum Gas Rate (Input BTUs)

Natural Gas: 9,500 – 199,000 BTU

Propane: 10,300 – 199,000 BTU

Energy Factor

Natural Gas: 0.93

Propane: 0.93

Thermal Efficiency

Natural Gas: 95%

Propane: 95%


AC 120 Volts, 60 Hz

Electrical Consumption

Normal: 59 Watts

Standby: 2 Watts

Anti-Frost Protection: 172 Watts

Gas Connection

Gas Supply: ¾ Inch MNPT

Cold Water Inlet: ¾ Inch MNPT

Hot Water Outlet: ¾ Inch MNPT

Temperature Settings

Residential: 98°F - 140°F

Commercial: 98°F - 185°F (commercial controller must be purchased separately)

* 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.

Get more information about this tankless water heater unit delivered to your inbox.

We will also include the contact information of three professional installers near your location or you can find a dealer now.