Rheem Commercial Tankless System – Wall Hanging Series

Commercial Tankless System – Wall Hanging

Rheem® Commercial Tankless System

This custom-built tankless solution arrives on the jobsite factory-assembled with single point connections, including:

  • RTGH-CM95 Condensing Tankless Water Heaters
  • Factory installed system control manifold
  • Pre-sized water and gas manifold
  • Electrical wiring
  • Condensate lines


  •  Wall mounted system
  •  Wall hung system
  • Free-standing system 

System Options

  • 2-6 tankless units per system
  • Indoor & Outdoor systems
  • Common venting options for up to 10 units
  • Easy manifolding of up to 20 units

 Engineered Solution by Rheem

  •  Scalable from 11,000 BTU/h to 1,199,400 BTU/h per system (6 units max per system rack, multiple racks can be linked up to 20 total units or 3,998,000 BTU/h)
  •  Multiple configurations
  •  Options for future expansion

 Installation Savings

  • Reduce installation costs with single point connections Industry Best Solutions
  • Minimum side to side clearances = 1/2 inch (to combustibles)
  • Minimum fow rate = 0.26 GPM
  • Minimum activation rate = 0.40 GPM
  • UL-1738 & ULC-S636 certification on PPs venting accessories Redundancy


  • 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 tap2

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


  • Manifold control models - with factory installed translator links up to 20 units
  • Hot-start programming - helps minimize fluctuation in water temperature, referred to as “cold water sandwich”, during periods of frequent on/off operation
  • Exclusive! Overheat film wrap with industry-best side to side clearance of 1/2 inch
  • EZ-Spec™ Sizing Software – advanced online tool that takes the guess work out of sizing tankless applications– available at www.rheem.com/tankless

Parts & Accessories

  • Common Venting: Direct Vent & Room Air header kits

For more information on recommended Commercial Tankless parts and accessories, see the Parts and Accessories Catalog or call 866-720-2076. (Sold Separately)

  • 95 - 96% Thermal Efficiency  
  • Standard Max High Temperature 185 ºF
  • Manifold Control Models link up to 20 units
  • Common Venting Compatible
  • Service valves included
  • 199, 000 BTU/h 
  • Commercial Project Sizing Available


Commercial Tankless System – Wall Hanging
Commercial Tankless Product Guide
Common Venting Feature Sheet
Common Venting Spec Sheet
EcoNet Feature Sheet
Tankless Unit Specification Sheet
Use & Care - English


Modular system allows Isolation to reduce downtime Warranty

5-Year heat exchanger, 5-years parts, 1-year rack parts and 1-year labor warranty

*See Commercial Warranty Certificate for  complete information*

KwikComfort® Financing can help make your purchase even easier.
Rheem makes it easy to find a financing option that works for you! With many options and benefits available, KwikComfort Financing is the best way to get the home comfort you need without the wait.

  • Applications made easyWe'll help you avoid lengthy contracts, headaches and hassles.
  • Kwik credit decisionsYou'll get an answer to your application within minutes.
  • Fast credit for the futureFinance your Rheem equipment and anything you want to add later.
  • Reduced interest/fixed paymentsGet low interest and fixed monthly payments until the purchase is paid.
  • Minimum monthly paymentTake advantage of convenient monthly payments that fit your budget.
  • Deferred interest/no interestEnjoy interest-free payments as long as the balance is paid by the due date.