RTG - 3 Mid-efficiency

High Efficiency Performance

  • Up to 1.5X the efficiency of a standard 50-gallon gas tank – .93 UEF for condensing and .82 UEF for non-condensing 
  • Up to 2.5X the lifespan of a standard 50-gallon gas tank – With the industry's most comprehensive 15-year warranty

Flexible Upgrade

  • Industry-best ½" side-to-side and front clearance to combustibles – Provides peace of mind to install in a closet and close the door 
  • Easy-hang front door – Slides down and hangs for easier servicing 
  • Faster servicing – A Phillips screwdriver is all that's needed to disassemble the unit Smarter Solution Built-in EcoNet® Wi-Fi Technology lets homeowners control Rheem® RTGH and RTG Series Tankless Water Heaters from their smart phone
  • Receive notifications, maintenance reminders and LeakGuard™ leak detection alerts 
  • Set temperature, change modes, and access energy and water usage reports

Sustainable Solution

  • Reduces carbon footprint and energy usage – The RTGH Series uses up to 34% less energy than a standard 50-gallon tank, while the RTG Series uses up to 25% less, helping minimize environmental impact 
  • Reduces greenhouse gas NOx emissions by up to 65%6 – Improving air quality

Rheem Ikonic

Easy Installation

  • PVC Vent runs up to 70' (2"), 150' (3") 
  • Easy set up with full text digital display and no dip-switches 
  • Field gas convertible from natural gas to LP - conversion kit included Ready for Retrofits 
  • Allows flex venting through existing B-vent up to 50' 
  • 1/2" Gas line compatibility (subject to local code) 
  • Approved for installations in Manufactured Home (Mobile Home) environments 

Key Features

  • Stainless steel Primary and Secondary heat exchangers provide increased efficiency and durability 
  • Rheem® Exclusive! Hot-start programming™ ensures the unit is in a ready state between back-to-back usage, avoiding any cold water bursts 
  • Built-in Recirculation pump for no wait continuous hot water at the tap (SR models) 
  • Built-in Wi-Fi with EcoNet® capability for direct control from your device (optional for S models)



  • Up to 96% Thermal Efficiency with stainless steel condensing heat exchanger
  • Intelligent electronic controls designed to increase energy efficiency and safety


  • Low flow fixture compatible – Industry 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 – Quickly pairs with our Recirculation Pump kit to provide instantaneous hot water at the tap

Easy Installation and Service

  • Ability to vent with room air
  • Indoor, Natural Gas units are common vent compatible up to 10 units
  • Common venting with Polypropelene 
  •  Built-in condensate neutralizer
  • 1/2" Gas line compatibility on every model
  • Exclusive! Maintenance Notice Setting Alerts – 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
  • Two-pipe direct vent system designed for PVC pipe (up to 38 ft. of 3" PVC pipe or 5 ft. of 2" PVC pipe)
  • High altitude capability up to 8,400 ft
  • Commercial Project Sizing Available from Rheem Applications Engineers
  • Digital remote control and 10 ft.of thermostat wire included
  • Freeze protection to -30°F



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