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10 Best gas tankless water heaters of 2025
Save up to 60% off
Best Choice1
Clicked 1,395 times in the last monthRinnaiNEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
Key specs-
maximum flow rate:11.1 GPM
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special features:Indoor/outdoor install
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maximum temperature:N/A
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voltage:N/A
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heat output:N/A
9.8Exceptional
Our Rating
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Value for Money2
RheemRheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
9.7Exceptional
Our Rating
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3
RaneinRanein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Key specs-
Brand:Ranein
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Color:Gray
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Battery Life:N/A
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Screen Size:N/A
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RAM Size:N/A
9.6Exceptional
Our Rating
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4
NessxaNatural Gas Tankless Water Heater, 14L Instant Hot Water Heater with Fahrenheit Digital Display, Indoor Installation Up to 3.7GPM, 95540BTU
10% Off9.5Excellent
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5
LiberLivePropane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 85,000 BTU On Demand Instant Hot Water Heater Propane Gas with LED Temperature Control Panel, 1/2" NPT Connector Size, CSA Certified, Gray
9.3Excellent
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RaneinRanein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Key specs-
maximum flow rate:3.6 Gallons Per Minute
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special features:Dry Combustion Protection, Flame Failure Protection
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maximum temperature:149 Degrees Fahrenheit
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voltage:120 Volts AC
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heat output:80,000 BTU
9.2Excellent
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RinnaiRinnai V75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation
60% OffKey specs-
maximum flow rate:7.5 Gallons Per Minute
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special features:Energy Factor of .82
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maximum temperature:140 F
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voltage:120 Volts
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heat output:N/A
9.1Excellent
Our Rating
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8
LiberLivePropane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 85,000 BTU On Demand Instant Hot Water Heater Propane Gas with LED Temperature Control Panel, 1/2" NPT Connector Size, CSA Certified, Gray
8.9Very Good
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RaneinRanein Propane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
8.8Very Good
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10
thermomateThermoMate CZ422NG, 102,000 BTU 4.7 GPM Natural Gas Tankless Water Heater, High Efficiency Instant On-Demand Hot Water for Whole House Use, Indoor Residential Water Heater with Multi-Point Heating
8.6Very Good
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