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Rheem RTG is a series of ultra low NOx, mid-efficiency tankless gas water heaters designed for continuous hot water Efficiency

  • .82 UEF -US
With all -copper heat exchanger

Product Size
  • Height: 23-5/8"
  • Width: 13-7/8"
  • Depth: 8-7/8"


  • EcoNet Enabled - all Tankless products from 2010 to present can connect to EcoNet mobile app via Tankless EcoNet Accessory Kit (REWRA630TWH)
  • Exclusive! Water Savings Setting – upon activation, this setting can save homeowners up to 1,100 gallons of water per year by reducing flow at the tap unitl set temperature is achieved (optional)
  • Industry Best! 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
  • Easy Installation and Service
  • 1/2" Gas line compatibility
  • Exclusive! Maintenance Notice Setting - Alerts homeowner, after 500 hours of use, to call for service check (optional)
  • 3"/5" concentric vent system with Integrated condensate collector
  • Connects to Metal Fab. Inc., 3"/5" concentric venting without an adapter


  • For higher demand applications, accessories available to link multiple units in a load-sharing system High Altitude Compliant
  • High-altitude capability – up to 8,400 ft. elevation above sea level Low Emissions
  • Environmentally Friendly ultra low NOx burner meets SCAQMD rule 1146.2 requirements Safety
  • Exclusive! Guardian OFW™overheat film wrap - prevents dangerous temperatures and provides industry best side-to-side clearance of 1/2 inch
  • Exclusive! Hot Start Programming - Minimizes cold water bursts by staying in ready-fire state for back-to-back hot water needs
  • Plus…Digital remote control and 10 ft. of thermostat wire included Requires 120V power supply (indoor models only) Industry Best! Freeze protection to -30°F Maximum water temperature is 140°F. For higher temperature applications, upgrade kits are available
Hide Description
Product Type:

Tankless Heater

Energy Star Rated:


BTU Input:


Energy Factor:


Installation Type:

Outdoor Only

Fuel Type:

Natural Gas

Temperature Range (F):

85°F - 140°F

Flow Range (GPM):

0.26 - 0.40



Cold Water Inlet (NPTM):


Gas Connection:


Hot Water Outlet (NPTF):



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):


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