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10 bestTankless Gas Water Heatersof September 2025

112M consumers helped this year.

1

Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater

Ranein

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

9.7

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4

Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5-Gallons Per Minute
Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5-Gallons Per Minute

Rinnai

9.5

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5

Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Natural Gas Water Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU
Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Natural Gas Water Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU

Rinnai

9.3

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Rheem RTG-70XLP-1 Tankless Water Heater, Grey, Grey

Rheem RTG-70XLP-1 Tankless Water Heater, Grey, Grey

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Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

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Takagi T-H3M-OS-N Condensing Outdoor Tankless Water Heater, Natural Gas

Takagi T-H3M-OS-N Condensing Outdoor Tankless Water Heater, Natural Gas

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14% off

6

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

9.1

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7

Noritz NRCB180DV-NG Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, Max 180,000 Dhw, 9.8 Gpm, 100,000 Btuh Space Heating-Natural Gas
Noritz NRCB180DV-NG Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, Max 180,000 Dhw, 9.8 Gpm, 100,000 Btuh Space Heating-Natural Gas

Noritz

8.8

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8

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

Rinnai

8.6

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14% off

9

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

Rinnai

8.3

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10

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

8.1

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