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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-84XLN-1 replaces Rheem RTG-84XLN

The RTG-84XLN-1 has a 40% thicker heat exchanger and a new burner pattern.


  • Next Generation Burner Technology
  • .26 GPM Minimum Flow Rate, .40 GPM Minimum Activation Flow Rate
  • UMC-117 remote control and 10 ft of thermostat wire is included
  • Ez-Link cable available for high demand applications to connect two tankless units to operate as one
  • Manifold up to 6 units with an optional MIC-6 manifold control board
  • All Rheem models can be linked in up to 20 unit manifold installations by using the optional MIC-180 and MICS-180 manifold control assembly
  • High-altitude capability - up to 9,840 ft elevation above sea level (no chip required)
  • Guardian OFW overheat film wrap
  • All Rheem tankless models are third-party efficiency certified by GAMA
  • Continuous hot water, energy saving and compact, space saving design
  • Intelligent electronic controls designed to increase energy efficiency and safety
  • Self Diagnostic System
  • Digital display shows temperature setting and maintenance codes
  • Built-in electric blower
  • Supplied with a 120 volt power cord
  • Environmentally friendly Low NOx burner meets SCAQMD rule 1146 requirements
  • Freeze protection to -30 degrees F
  • 11,000 - 180,000 BTU max
  • Temp Range 85 - 140 degrees F
  • 8.4 gal/min at 35 degree rise max.
  • 6.7 gal/min at 45 degree rise max.
  • 3.9 gal/min at 77 degree rise max.
  • *Flow rates vary depending on temperature of cold water supply.


New Features:

  • Approved for the add on of a Rheem recirculating pump (sold separately)
  • Water saving mode
  • Maintenance mode

Limited Warranty: 12-Year on heat exchanger, 5-Year on parts, 1-Year on labor. See Residential Warranty information Brochure for complete warranty information

More Information
MPN 671048
Weight 55.0000
Manufacturer Rheem
UPC 020352671048
GTIN 00020352671048
Generic Product Category Tankless Water Heater
Voltage 120V
Power 120 V
Energy Source Natural Gas
Energy Factor .82
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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