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Rinnai RU98EP 9.8 GPM Outdoor Ultra-Nox Condensing Tankless Propane Gas Water Heater

by Rinnai
Sold out
Original price $ 2,054.00
Current price $ 1,490.00
See more Rinnai tankless water heaters on their brand page


  • ENERGY STAR® Qualified
  • Energy Factor of .95 for 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



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 Propane
Energy Factor 0.95 for 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



FTC Energy Guide

Rinnai is continually updating and improving products; therefore, specifications are subject to change without prior notice. Local, state, provincial and federal codes must be adhered to prior to installation.