Click to enlargeTankless Water Heaters

Rheem tankless water heaters combine new technology and functionality in an innovative way to heat water. Since our tankless products only use energy to heat water as it is needed, no energy is wasted while there is no demand for hot water. In addition, our tankless products put you in complete control over your water temperature with a precise digital controller. A touch of your fingertip can adjust the maximum water temperature up or down to the perfect comfort level that's just right for you. Moms love this feature because it prevents water from getting too hot for their children. These features plus many more add up to pleasant lifestyle and considerable savings on your energy bill.

  • Indoor and Outdoor Models Available
  • Available in Natural Gas and LP Models 10-Year Limited
  • Warranty on Heat Exchanger - 3-Year Limited Warranty on Parts
  • Continuous hot water, Energy saving, Compact, space saving design.
  • Intelligent electronic controls and sensors -Self diagnostic program
  • Digital display shows temperature setting and maintenance codes
  • Exclusive sensing burner technology
  • Exclusive film wrap overheat limiter
  • Built-in electric blower
  • Indoor units use Category III stainless steel vent
  • Indoor models supplied with a 120 Volt power cord
  • Low NOx emissions meet SCAQMD rule 1146 requirements
  • A remote control thermostat is included with all models (100 F - 140 F setpoint range) Requires 18 AWG, 2 conductor thermostat wire for remote control connection. Optional additional remote controls are available.
  • Wire & Venting not included.

    Rheem tankless water heaters qualify for a $300 federal energy tax credit available now for a limited time.


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  • Click to enlarge42 Series - One Bathroom Indoor Tankless Water HeaterContinuous hot water and energy saving design. 4.2 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -20 degrees F.

    RTG2-42$925.50
    Choose Gas: 
    Click to enlarge53 Series - 1-2 Bathroom Indoor Tankless Water HeaterContinuous hot water and energy saving design. 5.3 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -20 degrees F. Direct Vent or power vent models are available. Purchase a venting kit for horizontal or vertical vented installations. Outdoor units require no additional venting.

    RTG-53$1,072.50
    Choose Gas & Venting: 
    Click to enlarge53 Series - 1-2 Bathroom Outdoor Tankless Water HeaterContinuous hot water and energy saving design. 5.3 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -20 degrees F. Outdoor units require no additional venting.

    RTG-53XN$1,015.30
    Choose Gas & Venting: 
    Click to enlarge74 Series - 2-3 Bathroom Indoor Tankless Water HeaterContinuous hot water and energy saving design. 7.4 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -30 degrees F. Direct Vent or power vent models are available. Purchase a venting kit for horizontal or vertical vented installations. Outdoor units require no additional venting.

    RTG-74$1,321.00
    Choose Gas & Venting: 
    Click to enlarge74 Series - 2-3 Bathroom Outdoor Tankless Water HeaterContinuous hot water and energy saving design. 7.4 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -30 degrees F. Outdoor units require no additional venting.

    RTG-74X$1,251.25
    Choose Gas & Venting: 
    Click to enlarge199 Series - 3 or More Bathroom Indoor Tankless Water HeaterHeavy Duty residential and commercial applications. Continuous hot water and energy saving design. 7.4 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -30 degrees F. Direct Vent or power vent models are available. Purchase a venting kit for horizontal or vertical vented installations. Outdoor units require no additional venting.

    GT-199$1,537.25
    Choose Gas & Venting: 
    Click to enlarge199 Series - 3 or More Bathroom Outdoor Tankless Water HeaterHeavy Duty residential and commercial applications. Continuous hot water and energy saving design. 7.4 gal/min at 45 degree rise maximum. Intelligent electronic control designed to increase energy efficiency and safety. Self diagnostic program, digital display shows temperature setting and maintenance codes. Built-in electric blower. Uses Category III stainless steel vents (not included) and can vent vertically or horizontally. 120 volt power cord included. Low NOx burner meets SCAQMD rule 1146 requirements. Freeze protection to -30 degrees F. Outdoor units require no additional venting.

    GT-199XN$1,499.00
    Choose Gas & Venting: 


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