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Mid Efficiency 70 Direct Vent Indoor Natural Gas EcoNet Enabled Tankless Water Heater with 12 Year Limited Warranty


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


  • .82 UEF -US
  • With all -copper heat exchanger
  • Intelligent electronic controls designed to increase energy efficiency and safety


  • Exclusive! Water savings setting –upon activation, this setting can save homeowners up to 1,100 gallon of water per year 1 by decreasing the flow of water through the pipes until the temperature reaches the heater’s set temperature
  • Low flow fixture compatible – Industry first minimum flow rate of .26 GPM and minimum activation flow rate of .40G PM ensures the user will receive hot water even in low demand situations
  • Recirculation Pump Kit-Ready – Quickly pairs with our Recirculation Pump kit to provide instantaneous hot water at the tap2

Easy Installation and Service

  • 1/2" Gas line compatibility on every model
  • Exclusive! Maintenance Notice Setting alerts homeowner – flashing a warning code to call for service check
  • Self-diagnostic system for easy installation and service
  • Digital display shows temperature setting and maintenance codes
  • 3"/5" concentric vent system with Integrated condensate collector
  • Connects to Metal Fab. Inc., 3"/5"concentric venting without an adapter


  • Hot-start programming helps minimize fluctuation in water temperature, referred to as “cold water sandwich”, during periods of frequent on/off operation
  • Exclusive! Guardian OFW™ overheat film wrap
  • 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 8,400 ft. elevation above sea level3

Low Emissions

Environmentally friendly ultra low NOx burner meets SCAQMD rule 1146.2 requirements


  • 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
Max GPM7
Recirc Incl.No
Warranty12 Yrs
  • .82 UEF -US
  • With all -copper heat exchanger
  • 11,000 - 160,000 BTU max.
  • 6.4 gal./min. at 35° F rise max.
  • 5.6 gal./min. at 45° F rise max.
Fuel Type Natural Gas
EF 0.82
Install Location Indoor
Primary Warranty 12 Yrs
Number Of Back To Back Showers ?
Max GPM 7
Number Of Bathrooms 3

2-3 Showers


BTU Input:

Energy Star Rated:

Installation Type:
Indoor Only

Energy Factor:

Vent Type:
Direct Vent

Fuel Type:
Natural Gas

Temperature Range (F):
85°F - 140°F

Flow Range (GPM):
0.26 - 0.40


12 Year Limited on Heat Exchanger/ 5 Year on Parts

BTU (Max):

BTU (Min):


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):

Hot Water Outlet (NPTF):

Cold Water Inlet (NPTM):

Gas Connection:

Height (Inches):

Width (Inches):

Depth (Inches):

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