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9 Best natural gas tankless water heaters of 2025
Explore top picks
Best Choice1
Clicked 1,234 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
9.8Exceptional
Our Rating
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Value for Money2
RheemRheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Key specs-
maximum flow rate:0.4 - 9.5 GPM
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special features:Electric ignition
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maximum temperature:140F
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maximum pressure:N/A
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heat output:N/A
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
VELPAXNatural Gas Tankless Water Heater,4.21GPM 16L Indoor,Instant Hot Gas Water Heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection
9.3Excellent
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5
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
9.0Excellent
Our Rating
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6
thermomateThermoMate 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 Simultaneous Heating
8.9Very Good
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7
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
Key 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
8.8Very Good
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8
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
8.7Very Good
Our Rating
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9
VELPAXNatural Gas Tankless Water Heater,4.74GPM 18L Indoor,Instant Hot Gas water heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection
8.5Good
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