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10 Best tankless gas water heaters of 2026
Save up to 25% off
Best Choice1
Clicked 527 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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voltage: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
RheemRheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater 8.4 GPM, 180,000 BTUs
16% Off9.7Exceptional
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4
RheemRheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 7.0 GPM, 160,000 BTUs
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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heat output:N/A
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voltage:N/A
9.6Exceptional
Our Rating
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5
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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voltage:N/A
9.5Excellent
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RaneinRanein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
25% Off Limited Time DealKey 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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heat output:80,000 BTU
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voltage:120 Volts AC
9.4Excellent
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7
FOGATTIFOGATTI Natural Gas Tankless Water Heater Outdoor - Max 8.1 GPM 180,000 BTU, CSA Certified Compact Design On Demand Instant Hot Water Heater - Instagas Comfort 180S Series, New Upgraded
9.2Excellent
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8
APUSAPUS Tankless Water Heater Natural Gas, Up to 4.42 GPM, Indoor Tankless Water Heater, 95,000 BTU on Demand Instant Hot Water Heaters with Smart Digital Display,Space Gray
9.0Excellent
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9
APUSAPUS Natural Gas Tankless Water Heater 140,000 BTU Indoor Installation Up to 6.8 GPM, Zero Cold Water for Technology Instant Hot Water on Demand, Smart Wi-Fi App Control
8.7Very Good
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10
thermomateThermoMate CZ422NG Natural Gas Tankless Water Heater, Up to 5 GPM 113,000 BTU, High Efficiency Instant On-Demand Hot Water for Whole House Use, Indoor Residential Water Heater with Multi-Point Heating
20% Off Limited Time Deal8.6Very Good
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