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Rheem 609966 - RTGH-84XLN Tankless Natural Gas Water Heater, High Efficiency, Outdoor, 11K - 157K, BTU

Item: RTGH-84XLN
MFR: 609966
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Rheem Prestige™ RTGH is a series of high efficiency condensing tankless gas water heaters designed for continuous hot water
  • Up to .94 Energy Factor with stainless steel condensing heat exchanger
  • Intelligent electronic controls designed to increase energy efficiency and safety
  • Third party efficiency listed by AHRI
  • Industry First, 0.26 GPM minimum flow rate, 0.40 GPM minimum activation flow rate
  • RTGH-84 for 2-3 bathroom homes*- 8.4 gal./min. at 35°F rise max., 6.6 gal./min. at 45°F rise
  • SCAQMD rule 1146.2 compliant
Compact Size
  • Compact space saving design - about the size of a medicine cabinet
Self-Diagnostic System
  • Self-diagnostic system for easy installation and service.
  • Digital display shows temperature setting and maintenance codes
  • Two-pipe direct vent system designed for PVC pipe, see instructions for details
  • Built-in electric blower
  • Exclusive, Guardian overheat film wrap (OFW)
  • EZ-Link cable available for higher demand applications to connect two tankless units to operate as one
  • Manifold up to six units with an optional MIC-6 manifold control board
  • Manifold up to 20 units with the optional MIC-185 plus the MICS-180 manifold control assembly
High Altitude Compliant
  • High-altitude capability - up to 9,840 ft. elevation above sea level
  • Digital remote control and 10 ft. of thermostat wire included
  • Supplied with a 120 volt power cord (indoor models only)
  • Freeze protection to -30°F
  • Required manual gas isolation valve included
  • *Based on simultaneous showers using 2.5 gallons per minute. Flow rates vary depending on temperature of cold water supply.


NameRheem 609966 - RTGH-84XLN Tankless Natural Gas Water Heater, High Efficiency, Outdoor, 11K - 157K, BTU
Gemaire Item NumberRTGH-84XLN
Manufacturer Product Number609966
SKU - PIM Number1404816218845
ERP Number359532
Unit of MeasureEACH
Weight82.0 Pound (lb.)
Length9.8 Inches (in)
Width18.5 Inches (in)
Height27.5 Inches (in)
Hazardous MaterialNo
EPA Cert RequiredNo
Country of OriginSJM
Connection Size3/4"
Gas Connection3/4"
Product FamilyRTGH
GEM - Case Quantity