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10 bestTankless Hot Water Heatersof December 2025

112M consumers helped this year.

27% off

1

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

9.9

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2

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

9.8

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3

RINNAI Ru Series Sensei Se+ Tankless Hot Water Heater: Indoor Installation
RINNAI Ru Series Sensei Se+ Tankless Hot Water Heater: Indoor Installation

Rinnai

9.6

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29% off

4

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

Rheem

9.3

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9% off

5

VEVOR Instant Water Heater, 18kw Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon Shampoo ETL Listed
VEVOR Instant Water Heater, 18kw Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon Shampoo ETL Listed

VEVOR

9.0

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Rinnai V53DeN Natural Gas Tankless Hot Water Heater, 5.3 GPM, Outdoor Installation

Rinnai V53DeN Natural Gas Tankless Hot Water Heater, 5.3 GPM, Outdoor Installation

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Rheem 11kW 240V Tankless Electric Water Heater

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Stiebel Eltron 12 Trend Tempra, Tankless Water Heater, White

Stiebel Eltron 12 Trend Tempra, Tankless Water Heater, White

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5% off

6

Rinnai RUCS65IP Ultra Series Tankless Water Heater, White
Rinnai RUCS65IP Ultra Series Tankless Water Heater, White

Rinnai

8.7

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7

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

Rheem

8.5

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8

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

8.2

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9

Rinnai RE140iP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Rinnai RE140iP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU

Rinnai

7.9

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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

7.6

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