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

Prestige Series Models

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Professional Prestige Series: 95 Direct Vent Indoor
  • ENERGY STAR® rated
  • Up to .96 EF with stainless steel condensing heat exchanger
  • Built-in Condensate Neutralizer – reduces installation cost and time
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Professional Prestige Series: 95 Outdoor
  • ENERGY STAR® rated
  • Up to .96 EF with stainless steel condensing heat exchanger
  • Built-in Condensate Neutralizer – reduces installation cost and time
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Professional Prestige Series: 90 Direct Vent Indoor
  • ENERGY STAR® rated
  • Up to .96 EF 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 .96 EF 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 .96 EF with stainless steel condensing heat exchanger
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Professional Prestige Series: 84 Outdoor
  • ENERGY STAR® rated
  • Up to .96 EF 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-04, RTEX-06
  • External Digital Display – shows outlet temperature
  • Durable Copper Immersion single heating element, field serviceable
  • Simple Installation – 3 Foot electric cable included; Bottom 1/2" NPT water connections
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Professional Classic Series: RTEX-08, RTEX-11, RTEX-13
  • External Adjustable Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Durable Copper Immersion two heating elements, field serviceable
  • Simple Installation – 3 Foot electric cable included; Side 1/2" NPT water connections
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Professional Classic Series: RTEX-18
  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion two heating elements, field serviceable
  • Simple Installation – Bottom 3/4" NPT water connections
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Professional Classic Series: RTEX-24, RTEX-27
  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion three heating elements, field serviceable
  • Simple Installation – Bottom 3/4" NPT water connections
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Professional Classic Series: RTEX-36
  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion four heating elements, field serviceable
  • Simple Installation – Bottom 3/4" NPT water connections
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Tankless Mid-Efficiency 95 Direct Vent Indoor
  • 11,000 - 199,900 BTU max.
  • 9.5 gal./min. at 35° F rise max.
  • 7.4 gal./min. at 45° F rise max
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Tankless Mid-Efficiency 95 Outdoor
  • 11,000 - 199,900 BTU max.
  • 9.5 gal./min. at 35° F rise max.
  • 7.4 gal./min. at 45° F rise max
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Tankless Mid-Efficiency 84 Direct Vent Indoor
  • 11,000 - 180,000 BTU max.
  • 8.4 gal./min. at 35° F rise max.
  • 6.7 gal./min. at 45° F rise max.
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Tankless Mid-Efficiency 84 Outdoor
  • 11,000 - 180,000 BTU max.
  • 8.4 gal./min. at 35° F rise max.
  • 6.6 gal./min. at 45° F rise max.
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Tankless Mid-Efficiency 64 Direct Vent Indoor
  • 11,000 - 150,000 BTU max.
  • 6.4 gal./min. at 35° F rise max.
  • 5.6 gal./min. at 45° F rise max.
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Tankless Mid-Efficiency 64 Outdoor
  • 11,000 - 150,000 BTU max.
  • 6.4 gal./min. at 35° F rise max.
  • 5.6 gal./min. at 45° F rise max.