Canada
Rheem Rheem
Find a pro
svg-icon
svg-icon
Warranty & Registration Lookup
Register your Rheem product or verify your warranty terms and coverage.
Learn more svg-icon
Find a Pro
Put your water heater and heating and cooling system installation in good hands with a trustworthy, independent Rheem Pro.
Search now svg-icon
Help and Support
Answer a few questions and we'll connect you with the correct team.
Get help svg-icon
Find Rebates
Search for and find local rebates for your new Rheem heating and cooling solution.
Learn more svg-icon
Project Sizing Solutions
Application Consulting for Customizable Water Heating Solutions.
Get help svg-icon
BIM/CAD Files
Browse and download BIM/CAD files for commercial heating and cooling solutions.
Browse BIM/CAD svg-icon
Replace a Part
Find what you need to keep your Rheem equipment working perfectly.
Get parts svg-icon
Who We Are
Learn more about Rheem, our history and our commitment to sustainability.
Learn more svg-icon
Sustainability
Learn about our commitment to doing good by our customers, our partners, our employees - and our planet.
Learn more svg-icon
Our Leadership
Find detailed profiles of our company's key executives, highlighting their professional backgrounds, expertise, and roles within the organization.
Learn more svg-icon
svg-icon
Residential Products
svg-icon
United States
Language
Americas
United States United States Canada Canada México México Bolivia Bolivia Brazil Brazil Chile Chile Colombia Colombia Argentina Argentina Perú Perú Ecuador Ecuador Paraguay Paraguay Uruguay Uruguay Honduras Honduras Panamá Panamá El Salvador El Salvador Costa Rica Costa Rica Guatemala Guatemala
Middle East, Asia & Ocenia
Asia Asia Indonesia Indonesia Singapore Singapore Philippines Philippines Vietnam Vietnam Malaysia Malaysia Middle East & Africa Middle East & Africa Australia Australia New Zealand New Zealand
HomeProductsHomeownersWater HeatersTankless Water Heaters

Tankless Water Heaters

With a full line of Rheem® tankless water heaters to choose from, there’s sure to be one that’s the right fit for your family.
Rebate Finder
Find local rebates for your new Rheem water heater.
Find a Pro
An independent Rheem Pro can help with installation and service.
Help & Support
Answer a few questions and we'll connect you with the correct team.
Category Sort Order
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
Edit Group
Professional Classic Series Tankless Electric RTEX-04T kW, RTEX-06T kW
  • Efficient Design – UEF up to .95 and advanced self-modulating technology only consumes the power needed to satisfy hot water demand
  • Flow Rate up to 0.25 GPM
  • Digital thermostatic temperature controls in 1-degree increments ranging from80°F - 140°F (26°C - 60°C)
  • Includes two optional 0.35 GPM aerators (flow restrictors) for optimal temperature output and performance
  • Stainless steel heat exchanger reduces corrosion for long life
  • Brass 1/2" NPT fittings located on the bottom for the inlet and outlet water connections
Edit Group
Professional Classic Series Tankless Electric RTEX-04T kW, RTEX-06T kW
  • Efficient Design – UEF up to .95 and advanced self-modulating technology only consumes the power needed to satisfy hot water demand
  • Flow Rate up to 0.25 GPM
  • Digital thermostatic temperature controls in 1-degree increments ranging from80°F - 140°F (26°C - 60°C)
  • Includes two optional 0.35 GPM aerators (flow restrictors) for optimal temperature output and performance
  • Stainless steel heat exchanger reduces corrosion for long life
  • Brass 1/2" NPT fittings located on the bottom for the inlet and outlet water connections
Edit Group
Professional Classic Series Tankless Electric RTEX-08 kW, RTEX-11 kW, RTEX-13 kW
5-5 GPM
  • UEF up to .96
  • Flow rate up to 3.2 GPM (See specification sheet for the GPM on each model)
  • Durable, lightweight engineered polymer shell does not rust or corrode.
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
Professional Classic Series Tankless Electric RTEX-08 kW, RTEX-11 kW, RTEX-13 kW
5-5 GPM
  • UEF up to .96
  • Flow rate up to 3.2 GPM (See specification sheet for the GPM on each model)
  • Durable, lightweight engineered polymer shell does not rust or corrode.
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
Professional Classic Series Tankless Electric RTEX-08 kW, RTEX-11 kW, RTEX-13 kW
5-5 GPM
  • UEF up to .96
  • Flow rate up to 3.2 GPM (See specification sheet for the GPM on each model)
  • Durable, lightweight engineered polymer shell does not rust or corrode.
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
Professional Classic Series Tankless Electric RTEX-18 kW
7-7 GPM
  • UEF up to .94
  • Flow rate up to 4.4 GPM
  • Durable powder-coated shell with a galvanized steel backplate.
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
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
Edit Group
Professional Classic Series Tankless Electric RTEX-24 kW, RTEX-27 kW
7-7 GPM
  • UEF up to .93
  • Flow rate up to 6.6 GPM (See specification sheet for the GPM on each model)
  • Durable powder-coated shell with a galvanized steel backplate
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
Professional Classic Series Tankless Electric RTEX-24 kW, RTEX-27 kW
7-7 GPM
  • UEF up to .93
  • Flow rate up to 6.6 GPM (See specification sheet for the GPM on each model)
  • Durable powder-coated shell with a galvanized steel backplate
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
Natural Gas
Propane Gas
Rheem IKONIC™ Super High Efficiency Condensing Tankless Gas Water Heater
8.4-11.2 GPM
  • .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
Edit Group
Professional Classic Series Tankless Electric RTEX-36 kW
8-8 GPM
  • UEF up to .94
  • Flow rate up to 8.8 GPM
  • Durable powder-coated shell with a galvanized steel backplate
  • Digital thermostatic temperature controls in 1-degree increments ranging from 80°F - 140°F (26°C - 60°C)
Edit Group
Helpful for Homeowner
Water Heaters
Heating & Cooling
Home Innovations
Pool & Spa Heaters
Rebate Centre
Commercial Solutions
Commercial Water Heaters
Heating & Cooling
Commercial Innovations
Professionals
MyRheem Portal
Replace a Part
Contractor Financing
Training
About Rheem
Who We Are
Sustainability
Help & Support
Sponsorships
Tools & Resources
Find a Pro
Product Registration
Rebate Center
HVAC KnowZone
Rheem Social
YouTube LinkedIn Facebook Instagram
Rheem Mobile
googlePlay appStore
Copyright 2004–2025 Rheem Manufacturing Company. All Rights Reserved.
Privacy Policy Supplier Code of Conduct ADA Accessibility Guidelines Cookie Policy Sales Policies & MAP Recall Information