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10 Best gas tankless water heaters of 2026
Save up to 25% off
1
Clicked 527 times in the last weekRinnaiNEW 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
9.8Exceptional
Our Rating
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RheemRheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
9.7Exceptional
Our Rating
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3
RaneinRanein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
25% OffKey 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
9.6Exceptional
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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
9.4Excellent
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HeatrovaNatural Gas Tankless Water Heater Indoor,HeatRova 4.3 GPM 102,000 BTU,Instant Hot Water,Constant Temperature,Pure Copper Heat Exchanger,3/4" NPT Connector,Energy-Saving,On-Demand for 3–4 Fixtures
9.2Excellent
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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% Off9.1Excellent
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NOVIEEXTankless Water Heater, Novieex On Demand Water Heater Natural Gas, Up to 4.3 GPM, 100,000 BTU Instant Hot Water Heater with LED Display, Indoor Installation, 2-4 Point Use for Family Bathroom Kitchen
25% Off9.0Excellent
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NOVIEEXTankless Water Heater, Novieex On Demand Water Heater Natural Gas, Up to 4.3 GPM, 100,000 BTU Instant Hot Water Heater with LED Display, Indoor Installation, 2-4 Point Use for Family Bathroom Kitchen
8.9Very Good
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RheemRheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater 8.4 GPM, 180,000 BTUs
16% Off8.8Very 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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heat output:N/A
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voltage:N/A
8.7Very Good
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