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10 bestElectric Tankless Water Heatersof September 2025

112M consumers helped this year.

1

RINNAI RXP199iN Condensing Tankless Water Heater RXP199 Features 0.96 UEF with 199k BTU and Pump.
RINNAI RXP199iN Condensing Tankless Water Heater RXP199 Features 0.96 UEF with 199k BTU and Pump.

Rinnai

9.9

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2

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, Small Grey
Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, Small Grey

Rheem

9.8

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3

Ranein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Residential Whole House Shower, Space Saving
Ranein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Residential Whole House Shower, Space Saving

Ranein

9.7

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4

CAMPLUX Tankless Electric Water Heaters 18kW, On Demand Hot Water Heater Electric with Digital Display 240V for Shower, White
CAMPLUX Tankless Electric Water Heaters 18kW, On Demand Hot Water Heater Electric with Digital Display 240V for Shower, White

CAMPLUX ENJOY OUTDOOR LIFE

9.5

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14% off

5

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

Rheem

9.3

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Related productsUp to 18% off

VEVOR Instant Water Heater, 8kw On Demand Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon ETL Listed

VEVOR Instant Water Heater, 8kw On Demand Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon ETL Listed

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Rheem 11kW 240V Tankless Electric Water Heater

Rheem 11kW 240V Tankless Electric Water Heater

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Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater

Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater

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Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, Gray

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, Gray

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6

Ranein Electric Tankless Water Heater, 11Kw 240v,Instant Hot Water Heater with LED Temperature Display, Energy Saving, Save Space
Ranein Electric Tankless Water Heater, 11Kw 240v,Instant Hot Water Heater with LED Temperature Display, Energy Saving, Save Space

Ranein

9.1

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14% off

7

RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.
RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.

Rinnai

8.9

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8

Marey ECO150 Electric Tankless Water Heater, 14.5kW 240V, Smart Technology, Unlimited On-Demand Hot Water Heater
Marey ECO150 Electric Tankless Water Heater, 14.5kW 240V, Smart Technology, Unlimited On-Demand Hot Water Heater

MAREY

8.6

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10% off

9

thermomate Electric Tankless Water Heater, 11kW at 240 Volt, On Demand Instant Hot Water Heater, Self Modulating Energy Saving, Save Space, 2.15GPM at 35°F Rise
thermomate Electric Tankless Water Heater, 11kW at 240 Volt, On Demand Instant Hot Water Heater, Self Modulating Energy Saving, Save Space, 2.15GPM at 35°F Rise

thermomate

8.4

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10

Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White - 23, Gloss White
Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White - 23, Gloss White

Stiebel Eltron

8.2

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