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Rheem RTG-84XLN-1 Outdoor Natural Gas Tankless Water Heater

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Rheem RTG-84XLN-1 Outdoor Non-Condensing Natural Gas Tankless Water Heater

Rheem RTG-84XLN-1 Outdoor Natural Gas Tankless Water Heater


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


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


  • 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 Friendlyultra low NOx burner meets SCAQMD rule 1146.2 requirements


  • Exclusive! Guardian OFWoverheat 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


  • Digital remote control and 10 ft. of thermostat wire included
  • Requires 120V power supply (indoor models only)
  • Industry Best!Freeze protection to -30F
  • Maximum water temperature is 140F. For higher temperature applications, upgrade kits are available

File Downloads

(Size: 13.9 MB)
Rheem Mid Efficiency Manual
(Size: 14.7 MB)
Rheem RTGH Manual De Uso Y Cuidados (Spanish)
(Size: 16 MB)
Rheem Tankless Full Line Brochure
More Information
MPN 671048
Weight 55.000000
Manufacturer Rheem
UPC 020352671048
GTIN 00020352671048
Category Tankless Water Heater
Voltage 120V
Power 120 V
Energy Source Natural Gas
Energy Factor .82
Tankless Type Non-Condensing
Flow Rate @ 35 F Rise 8.4 GPM
Flow Rate @ 45 F Rise 6.7 GPM
Water Connection 3/4 Inch
Gas Connection 3/4 Inch
Number of Bedrooms 2-3 Bedrooms
Max Heating BTU 180,000
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