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10 bestIndoor Gas Tankless Water Heaterof May 2025

112M consumers helped this year.

24% off

1

Natural Gas Tankless Water Heater, Indoor Max 7.4 GPM, 190,000 BTU Instant Hot Water Heater
Natural Gas Tankless Water Heater, Indoor Max 7.4 GPM, 190,000 BTU Instant Hot Water Heater

Ranein

9.9

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2

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

9.8

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3

CAMPLUX CX360 Propane Indoor Tankless Water Heater 13L, 82,000 BTU Instant Gas Hot Water Heater, White
CAMPLUX CX360 Propane Indoor Tankless Water Heater 13L, 82,000 BTU Instant Gas Hot Water Heater, White

CAMPLUX ENJOY OUTDOOR LIFE

9.6

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4

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

9.4

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26% off

5

RINNAI RX199iN Condensing Tankless Water Heater RX199 Features 0.96 UEF with 199k BTU.
RINNAI RX199iN Condensing Tankless Water Heater RX199 Features 0.96 UEF with 199k BTU.

Rinnai

9.2

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Related productsUp to 29% off

Rinnai RUCS65IN Ultra Series Tankless Water Heater, White

Rinnai RUCS65IN Ultra Series Tankless Water Heater, White

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ONSEN 14L Propane Direct Vent Tankless Water Heater - Electronic Ignition - Hot Water On Demand - for Indoor Residential Tiny Home Use - with LED Screen & Display Panel - 120v

ONSEN 14L Propane Direct Vent Tankless Water Heater - Electronic Ignition - Hot Water On Demand - for Indoor Residential Tiny Home Use - with LED Screen & Display Panel - 120v

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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

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Rinnai RU130iN Condensing Tankless Hot Water Heater, 7 GPM, Natural Gas, Indoor Installation

Rinnai RU130iN Condensing Tankless Hot Water Heater, 7 GPM, Natural Gas, Indoor Installation

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6

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

Rinnai

9.0

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7

GASLAND 2.64 GPM Indoor Natural Gas Tankless Water Heater, 68,000 BTU Residential On Demand Gas Water Heater, 120 Volt Multiple Points of Use Water Heater
GASLAND 2.64 GPM Indoor Natural Gas Tankless Water Heater, 68,000 BTU Residential On Demand Gas Water Heater, 120 Volt Multiple Points of Use Water Heater

GASLAND

8.7

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8

Tankless Water Heater Propane, Camplux 3.18 GPM Instant Hot Water Heater with Fahrenheit Digital Display, Residential Propane Gas Water Heater for 2-3 Persons Bathroom Indoor Use, White
Tankless Water Heater Propane, Camplux 3.18 GPM Instant Hot Water Heater with Fahrenheit Digital Display, Residential Propane Gas Water Heater for 2-3 Persons Bathroom Indoor Use, White

CAMPLUX ENJOY OUTDOOR LIFE

8.5

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9

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

8.2

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10

Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater, Up to 7.6 GPM, Indoor Installation, 199,000 BTU
Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater, Up to 7.6 GPM, Indoor Installation, 199,000 BTU

Rinnai

7.9

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