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10 Best tankless gas hot water heaters of 2025
Save up to 23% off
Best Choice1
Clicked 1,194 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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heat output:N/A
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maximum pressure:N/A
9.9Exceptional
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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heat output:N/A
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maximum pressure:N/A
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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heat output:68000 BTU/hour
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maximum pressure:3.6 PSI
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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FOGATTIFOGATTI Natural Gas Tankless Water Heater - Outdoor Installation Up to 8.1 GPM, Gray Instant Hot Water Heater - Instagas Comfort 180S Series
15% Off9.0Excellent
Our Rating
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7
RinnaiRinnai V75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation
12% 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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heat output:N/A
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maximum pressure:N/A
8.9Very Good
Our Rating
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8
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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heat output:N/A
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maximum pressure:N/A
8.8Very Good
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9
RheemRheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 9.5 GPM
23% OffKey specs-
maximum flow rate:9.5 Gallons Per Minute
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special features:Leak Detection & Prevention
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maximum temperature:140 Degrees Fahrenheit
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heat output:N/A
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maximum pressure:N/A
8.7Very Good
Our Rating
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10
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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