Rheem RTG-84XLN Tankless Water Heater, Natural Gas 180,000 BTU Max Direct Vent Whole House - Outdoor, 8.4 GPM

SKU: 826255
Brand: Rheem Model: RTG-84XLN Condition: New

Rheem RTG-84XLN Gas Tankless Water Heaters

Our Price: $863.95
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Natural gas is one of the most effective methods of heating your home’s water. The natural gas Rheem RTG-84XN Outdoor Tankless Water Heater for 2 or 3 Bathroom Homes utilizes this outstandingly cost effective method to bring you an affordable, reliable hot water heating system that is tank free. The modern way of supplying hot water to your home, Rheem devices come with impressive industry ratings, making them a leader in their own right.

Able to supply 8.4 gallons of water per minute to larger homes with two or three bathrooms, this unit remains one of the top rated devices for tankless water heating. In fact, it supplies owners with an industry best rating of .26 GPM minimum flow rate and a minimum activation flow rate of .40 GPM.

Generation burner technology allows the Rheem RTG-84XN Outdoor Tankless Water Heater for 2 or 3 Bathroom Homes to function as a standalone unit or as part of a system with other Rheem devices, giving you total control of your home’s hot water heating system.

IMPORTANT: Must be PROFESSIONALLY INSTALLED to be eligible to receive a factory warranty.

Note: Proper gas pressure must be ensured to supply tankless gas water heaters up to 180,000 BTU for RTG-84 models. (Consult your gas supplier)


  • New! Next Generation Burner Technology
  • Industry Best! .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
  • New! Manifold up to 6 units with an optional MIC-6 manifold control board
  • Exclusive! 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)
  • Exclusive! Guardian OFWTM 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°F


  • Model: RTG-84XN
  • Gas Input/BTU/HR: 11,000-180,000
  • Type: Outdoor
  • Temp Range: 85° - 140°
  • GPM @ 77° Rise Max: 3.9
  • GPM @ 45° Rise Max: 6.7
  • GPM @ 35° Rise Max: 8.4
  • Gas/Water Connection: 3/4
  • Dimensions: 25 5/8 H x 13 7/8 W x 8 7/8 D
  • Ship Weight: 54 pds
  • Energy Factor: 0.82
  • D.O.E Ann. Op. Cost NAT/LP: $223/$374
  • Energy Factor and Average Annual Operating Costs based on D.O.E. (Department of Energy) test procedures. D.O.E. national average fuel rate natural gas $1.218/therm; LP $1.87/gallon.

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