Rheem Commercial Tankless System – Wall Mounted Series

Commercial Tankless System – Wall Mounted

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 Mounted
Commercial Tankless Product Guide
Common Venting Feature Sheet
Common Venting Spec Sheet
EcoNet Feature Sheet
Tankless Unit Specification Sheet
Use and Care Instructions


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.