Who We Are
Learn more about Rheem, our history and our commitment to sustainability.
Sustainability
Learn about our commitment to doing good by our customers, our partners, our employees - and our planet.
Our Leadership
Find detailed profiles of our company's key executives, highlighting their professional backgrounds, expertise, and roles within the organization.
svg-icon
Residential Products
svg-icon
HomeProductsResidentialWater HeatersRheem IKONIC™ SUPER HIGH EFFICIENCY CONDENSING TANKLESS GAS WATER HEATER

Rheem IKONIC SUPER HIGH EFFICIENCY CONDENSING TANKLESS GAS WATER HEATER

MODEL CRTGH-S11i
  • 15 Year Heat Exchanger 
  • 5-Year Parts | 1-Year Labor
  • .96 UEF – ENERGY STAR® Rated
  • Save up to 33% per year in energy costs
  • Qualified for local utility rebates
  • Field gas convertible from natural gas to LP- conversion kit included
Select GPM
8
GPM
10
GPM
11
GPM

SKU CRTGH-S11i
Warranty Years 15
Model Rheem IKONIC SUPER HIGH EFFICIENCY CONDENSING TANKLESS GAS WATER HEATER
GPM 11.2
Fuel Natural Gas,Propane Gas
WiFi Connectivity Yes
Depth 13.69"
Height 28.56"
Width 17.31"
UEF
0.96
High Efficiency Yes
Energy Star Rated Yes
LowNox Yes

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 ManufacturedHome (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

  • 15 Year Heat Exchanger 
  • 5-Year Parts | 1-Year Labor

More Residential Rheem Products

Find additional documentation by viewing these related products.

Natural Gas
Propane Gas
CRTGH Series Super High Efficiency Condensing Tankless Gas Water Heater With Built-In Wi-Fi
6.6-9.5 GPM
  • .93 UEF Rated
  • Built-in EcoNet® Wi-Fi Technology
  • LeakGuard® Leak Detection and Prevention System
  • Indoor Model Only 
Natural Gas
Propane Gas
Professional Prestige Series: 9.5 GPM Indoor Tankless
9.5-9.5 GPM
  • Up to .93 UEF
  • Built-in Condensate Neutralizer
Natural Gas
Propane Gas
Rheem IKONIC SUPER HIGH EFFICIENCY CONDENSING TANKLESS GAS WATER HEATER WITH RECIRCULATING PUMP
8.4-11.2 GPM
  • .96 UEF – ENERGY STAR® Rated
  • Save up to 33% per year in energy costs
  • Qualified for local utility rebates
  • Built-in WiFi
Natural Gas
Propane Gas
Rheem® ThermaForce Super High Efficiency Condensing Tankless Gas Water Heaters
10.1-10.1 GPM
  • Up to .90 UEF
  • Save up to 32% annually in energy costs 
  • Only 4 moving parts - Damper, Fan, Gas Valve, Mixing Valve
  • Built-in Illuminated Touchscreen Control Panel