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9 Best natural gas tankless water heaters of 2025
Save up to 15% off
Best Choice1
Clicked 1,165 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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maximum pressure:N/A
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heat output:N/A
9.9Exceptional
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
9.8Exceptional
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
9.7Exceptional
Our Rating
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4
forimoTankless Water Heater Natural Gas,4.74GPM 18L Indoor,Instant Hot Gas Water Heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection (Black)
Key specs-
maximum flow rate:4.74 GPM
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special features:Steady Temperature Control
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maximum temperature:167 F
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maximum pressure:3.6 PSI
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heat output:68000 BTU/hour
9.4Excellent
Our Rating
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5
VELPAXNatural Gas Tankless Water Heater,4.21GPM 16L Indoor,Instant Hot Gas Water Heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection
9.1Excellent
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RheemRheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 7.0 GPM
Key specs-
maximum flow rate:7 Gallons Per Minute
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special features:Continuous Hot Water, Energy Efficient
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maximum temperature:140 Degrees Fahrenheit
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maximum pressure:N/A
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heat output:N/A
9.0Excellent
Our Rating
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7
VELPAXNatural Gas Tankless Water Heater,4.74GPM 18L Indoor,Instant Hot Gas water heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection
8.8Very Good
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RheemRheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
Key specs-
maximum flow rate:7 Gallons Per Minute
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special features:Continuous Hot Water
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maximum temperature:140 Degrees Fahrenheit
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maximum pressure:N/A
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heat output:N/A
8.7Very Good
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9
FOGATTIFOGATTI Natural Gas Tankless Water Heater Indoor - Up to 5.1 GPM 120,000 BTU Instant Hot CSA Certified Compact Design Tankless Water Heater for 2-4 Outlet Points - Instagas Comfort 120S Series
15% OffKey specs-
maximum flow rate:5.1 GPM
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special features:Multi-Point Hot Water Supply
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maximum temperature:N/A
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maximum pressure:150 PSI
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heat output:N/A
8.6Very Good
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