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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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voltage:N/A
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heat output:N/A
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wattage:N/A
9.8Exceptional
Our Rating
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Value for Money2
RinnaiNEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU
Key specs-
maximum flow rate:Up to 9 GPM
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special features:Versa Vent, Smart Sense
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voltage:N/A
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heat output:N/A
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wattage:N/A
9.5Excellent
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3
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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voltage:120 Volts AC
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heat output:80,000 BTU
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wattage:N/A
9.4Excellent
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4
FOGATTIFOGATTI Natural Gas Tankless Water Heater Indoor - Max 7.5 GPM 170,000 BTU, CSA Certified Compact Design On Demand Instant Hot Water Heater - Instagas Comfort 170S Series
Key specs-
maximum flow rate:7.5 Gallons Per Minute
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special features:Multi-Point Hot Water Supply, 2 to 5 Years Warranty, Easy Indoor Installation, CSA Certificated, Energy Saving & High Efficiency
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voltage:120 Volts AC
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heat output:N/A
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wattage:43 Watt-hours
9.2Excellent
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5
SNDOASSNDOAS Tankless Water Heater,16L On Demand Water Heater Natural Gas, 4.23 GPM 85,300BTU Instant Hot Water, LED Display, Indoor Installation, 2-3 Point Use for Family Bathroom Kitchen,White
9.1Excellent
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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
8.8Very Good
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7
RinnaiRinnai V53DeN Natural Gas Tankless Water Heater - 5.3 GPM, Outdoor Installation
Key specs-
maximum flow rate:5.3 GPM
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special features:Endless Hot Water
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voltage:120 Volts
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heat output:81 Kilowatts
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wattage:N/A
8.7Very Good
Our Rating
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8
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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9
RheemRheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater 8.4 GPM, 180,000 BTUs
15% Off8.5Good
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10
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
8.3Good
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