TanklessWater Heaters

Enjoy Continuous Hot Water

Rheem tankless water heaters provide the comfort and convenience of having a continuous supply of hot water. Our gas models are great as a hot water solution for homes with busy families, homes with luxury bathrooms and vacation home.

If you are looking for a hot water solution for a single faucet or shower, please see our electric tankless products below.

Defining a new standard in quality.

Our ProfessionalTM Line is a complete range of hot water solutions with exclusive features and professional grade quality. These products are available exclusively through our contractor partners.

Professional Line

Prestige Series Models

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    Professional Prestige Series: Condensing Tankless Gas Water Heaters with Built-in Recirculation

    • .94 UEF - US
    • .96 EF - Canada
    • Built-in Recirculation
    • Programmable timer based activation
    • Reduces Water Waste
    • Ultra Low NOx Burner meets SCAQMD rule 1146.2

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      Professional Prestige Series: 96 Direct Vent Indoor

      • High Efficiency Tankless with EcoNet® Smart Home Technology
      • Up to .96 EF/ .93 UEF
      • Built-in Condensate Neutralizer
      • ENERGY STAR® rated

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        Professional Prestige Series: 96 Outdoor
        • High Efficiency Tankless with EcoNet® Smart Home Technology
        • Up to .96 EF/ .93 UEF
        • Built-in Condensate Neutralizer
        • ENERGY STAR® rated

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          Professional Prestige Series: 90 Direct Vent Indoor
          • ENERGY STAR® rated
          • Up to .93 UEF with stainless steel condensing heat exchanger
          • Built-in Condensate Neutralizer – reduces installation cost and time
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            Professional Prestige Series: 90 Outdoor
            • ENERGY STAR® rated
            • Up to .93 UEF with stainless steel condensing heat exchanger
            • Built-in Condensate Neutralizer – reduces installation cost and time
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              Professional Prestige Series: 84 Direct Vent Indoor
              • Continuous hot water, energy saving and compact, space saving design
              • Self Diagnostic System
              • Up to .93 UEF with stainless steel condensing heat exchanger
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                Professional Prestige Series: 84 Outdoor
                • ENERGY STAR® rated
                • Up to .93 UEF with stainless steel condensing heat exchanger
                • Built-in Condensate Neutralizer – reduces installation cost and time

                Specialty Models

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                  Professional Classic Series: RTEX-36
                  • ON/OFF Dial Control with adjustable digital temperature display
                  • Self-modulating power control
                  • Flow Rate: up to 8.8 GPM
                  • Bottom 3/4" NPT water connections
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                    Professional Classic Series: RTEX-24, RTEX-27
                    • ON/OFF Dial Control with adjustable digital temperature display
                    • Self-modulating power control
                    • 24kW Model Flow Rate: up to 5.9 GPM
                    • 247W Model Flow Rate: up to 6.6 GPM
                    • Bottom 3/4" NPT water connections
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                      Professional Classic Series: RTEX-08, RTEX-11, RTEX-13
                      • ON/OFF Dial Control with adjustable digital temperature display
                      • Self-modulating power control
                      • 8kW Model Flow Rate: up to 1.95 GPM
                      • 11kW Model Flow Rate: up to 2.68 GPM
                      • 13kW Model Flow Rate: up to 3.17 GPM
                      • Side 1/2" NPT water connections
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                        Professional Classic Series: RTEX-04, RTEX-06
                        • Push-button ON/OFF control with LED temperature display
                        • 3.5kW Model Flow Rate: up to 0.9 GPM
                        • 6kW Model Flow Rate: up to 1.5 GPM
                        • Bottom 1/2" NPT water connections
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                          Professional Classic Series: RTEX-18
                          • ON/OFF Dial Control with adjustable digital temperature display
                          • Self-modulating power control
                          • Flow Rate: up to 4.4 GPM
                          • Bottom 3/4" NPT water connections

                          A new level of performance for every home.

                          Our Performance® Line is a complete range of Rheem-quality hot water solutions to fit any home, lifestyle and budget.

                          Performance® Line

                          Performance Models

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                            Performance Condensing Tankless Gas Water Heaters with Built-in Recirculation

                            • .94 UEF / .96 EF Rating
                            • Built-in Recirculation
                            • Programmable timer based activation
                            • Reduces Water Waste
                            • Ultra Low NOx Burner meets SCAQMD rule 1146.2

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                              Performance Condensing 94 Direct Vent Indoor
                              • Up to 94% energy efficient with stainless steel condensing heat exchanger
                              • Intelligent electronic controls designed to increase energy efficiency and safety
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                                Performance Condensing Tankless 94 Outdoor
                                • Up to 94% energy efficient with stainless steel condensing heat exchanger
                                • Intelligent electronic controls designed to increase energy efficiency and safety
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                                  Performance Condensing 84 Direct Vent Indoor
                                  • Up to 94% energy efficient with stainless steel condensing heat exchanger
                                  • Intelligent electronic controls designed to increase energy efficiency and safety
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                                    Performance Condensing 84 Outdoor
                                    • Up to 94% energy efficient with stainless steel condensing heat exchanger
                                    • Intelligent electronic controls designed to increase energy efficiency and safety
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                                      Performance Mid-Efficiency 9.5 GPM Direct Vent Indoor with Built-In Recirculation Pump
                                      • Built-In Recirculation Pump for added water savings and faster hot water
                                      • .81 - .82 UEF
                                      • Digital display shows temperature setting and maintenance codes
                                      • Intelligent electronic controls designed to increase energy efficiency and safety
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                                        Performance Mid-Efficiency 9.5 GPM Direct Vent Indoor
                                        • .82 Energy Factor (EF)
                                        • 8.4 gal./min. at 45°F rise
                                        • 6.6 gal./min. at 45°F rise
                                        • 5.6 gal./min. at 45°F rise

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                                          Performance Mid-Efficiency 9.5 GPM Outdoor
                                          • .82 Energy Factor (EF)
                                          • 8.4 gal./min. at 45°F rise
                                          • 6.6 gal./min. at 45°F rise
                                          • 5.6 gal./min. at 45°F rise

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                                            Performance Mid-Efficiency 8.4 GPM Direct Vent Indoor
                                            • .81 - 82 Uniform Energy Factor (UEF) with all copper heat exchanger
                                            • Recirculation Pump Kit Ready
                                            • Designed for easy installation
                                            • 8.4 gal./min. at 45°F rise
                                            • 6.6 gal./min. at 45°F rise
                                            • 5.6 gal./min. at 45°F rise

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                                              Performance Mid-Efficiency 8.4 GPM Outdoor
                                              • .82 Energy Factor (EF)
                                              • 8.4 gal./min. at 45°F rise
                                              • 6.6 gal./min. at 45°F rise
                                              • 5.6 gal./min. at 45°F rise

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                                                Performance Mid-Efficiency 6.4 GPM Direct Vent Indoor
                                                • .82 Energy Factor (EF)
                                                • 8.4 gal./min. at 45°F rise
                                                • 6.6 gal./min. at 45°F rise
                                                • 5.6 gal./min. at 45°F rise

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                                                  Performance Mid-Efficiency 6.4 GPM Outdoor
                                                  • .82 Energy Factor (EF)
                                                  • 8.4 gal./min. at 45°F rise
                                                  • 6.6 gal./min. at 45°F rise
                                                  • 5.6 gal./min. at 45°F rise

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                                                    Performance Tankless Electric 36kw
                                                    • 99.8% Energy efficient
                                                    • Simple Installation
                                                    • Digital temperature display
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                                                      Performance Tankless Electric 3-6kw
                                                      • 99.8% Energy efficient
                                                      • Simple Installation
                                                      • Digital temperature display
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                                                        Performance Tankless Electric 24-27kw
                                                        • 99.8% Energy efficient
                                                        • Simple Installation
                                                        • Digital temperature display
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                                                          Performance Tankless Electric 18kw
                                                          • 99.8% Energy efficient
                                                          • Simple Installation
                                                          • Digital temperature display
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                                                            Performance Tankless Electric 8-11-13kw
                                                            • 99.8% Energy efficient
                                                            • Simple Installation
                                                            • Digital temperature display