Luxury Series Tankless Water Heater

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RL94i (REU-VC2837FFUD-US) click to zoom into photo of
  • ENERGY STAR® Qualified
  • Energy Factor of .82 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)
  • Certified for Installation in Manufactured (Mobile) Homes
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Temperature lock function prevents accidental or unauthorized changes to water temperature

Width: 14 Inches (355.6 mm)

Height: 23 Inches (584.2 mm)

Depth: 9 Inches (228.6 mm)


46.3 lbs (21.0 kg)

Installation Type


Minimum/Maximum BTU

10,300 / 199,000 Natural Gas and Propane

Energy Factor

0.82 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° Temperature Rise)

4.7 / 6.6 gpm (17.8 / 29.2 lpm)

Hot Water Flow Rate Range

0.26 - 9.8 gpm (0.98 - 37.1 lpm)


Standard: MC-91-2US

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

Ultra Lox NOx


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


Valves Shipped in Box


High Altitude Approved

Up to 10,200 ft. (3,109 m)



Venting Options


Tankless Rack System (TRS/TRW) Compatible


1/2" Gas Line Compatible***


* For complete information and details regarding Rinnai’s warranty, please visit rinnai.us.
* To achieve temperatures over 140°F, an MCC-91 commercial controller must be purchased separately.
*** For complete information on gas sizing for Rinnai Tankless Water Heaters, consult the Operation and Installation Manual

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