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High Efficiency 9.5 GPM Outdoor Natural Gas EcoNet Enabled Tankless Water Heater with 12 Year Limited Warranty


Rheem Prestige® RTGH is a series of high efficiency condensing tankless gas water heaters designed for continuous hot water


  • Up to .93 UEF - US
  • With stainless steel condensing heat exchanger


  • Exclusive! Water Savings Setting upon activation, this setting can save homeowners up to 1,100 gallons of water per year by decreasing the flow of water through the pipes until the temperature reaches the heater’s set temperature
  • Industry Leading Low Flow Activation - Minimum flow rate of .26 GPM and minimum activation flow rate of .40 GPM ensures the user will receive hot water even in low demand situations
  • Recirculation Pump Kit-Ready – Providing faster hot water at the tap and savings of up to 12,000 gallons water/year
  • Exclusive! Hot Start Programming - Minimizes cold water bursts by staying in ready-fire state for back-to-back hot water needs

Easy Installation and Service

  • New! 2" Venting with band connections
  • New! Vent uo to 150 ft with 3" PVC and 60 ft with 2" PVC
  • Built-in condensate neutralizer
  • 1/2" Gas line compatibility up to 24ft.
  • Exclusive! Maintenance Notice Setting - Alerts homeowner, after 500 hours of use, to call for service check (optional)
  • Self-diagnostic system for easy installation and service
  • High-altitude capability – up to 8,400 ft. elevation above sea level
  • Digital remote control now pre-wired and 10 ft. of thermostat wire included
  • Supplied with a 120-volt power cord (indoor models only)


  • EcoNet Enabled - all Tankless products from 2010 to present can connect to EcoNet mobile app via Tankless EcoNet Accessory Kit (REWRA630TWH)
  • For higher demand application, easily link multiple tankless units to operate as one system:
  • 2 Units: EZ Link Cable
  • Up to 6 units: MIC-6 Control Board
  • Up to 20 units: MIC-185 plus MICS-180 manifold control assembly

Environmentally Friendly Low Emissions

  • Ultra low NOx burner meets SCAQMD rule 1146.2 requirements


  • Exclusive! Overheat Film Wrap - prevents dangerous temperatures and provides industry best side-to-side clearance of 1/2 inch
  • Industry Best! Freeze protection to -30°F
Max GPM 9.5
Recirc Incl No
Warranty12 Yrs
  • High Efficiency Tankless with EcoNet®?Smart Home Technology
  • Up to .93 UEF - US
  • Built-in Condensate Neutralizer
  • ENERGY STAR® rated
Fuel Type Natural Gas
EF 0.96
Install Location Outdoor
Primary Warranty 12 Yrs
Number Of Back To Back Showers ?
Max GPM 9.5
Number Of Bathrooms 4


Installation Type:
Outdoor Only

Energy Factor:

Fuel Type:
Natural Gas

Energy Star Rated:

4 Showers


BTU Input:

Temperature Range (F):
85°F - 140°F


Flow Range (GPM):
0.26 - 0.40

12 Year Limited on Heat Exchanger/ 5 Year on Parts

BTU (Max):

BTU (Min):

Vent Type:
Outdoor (No Venting)


Flow Rate at 40F Temp Rise (GPM):

Flow Rate at 50F Temp Rise (GPM):

Flow Rate at 60F Temp Rise (GPM):

Flow Rate at 70F Temp Rise (GPM):

Cold Water Inlet (NPTM):

Gas Connection:

Hot Water Outlet (NPTF):

Height (Inches):

Width (Inches):

Depth (Inches):

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