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10 Best whole house electric tankless water heaters of 2025
Save up to 30% off
Best Choice1
Stiebel EltronStiebel Eltron Tankless Water Heater - Tempra 20 Trend – Electric, On Demand Hot Water, Eco, White
9.9Exceptional
Our Rating
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Value for Money2
WestinghouseWestinghouse 240V Tankless Water Heater Electric, Instant Hot Water Heater, On Demand Hot Water, Smart WiFi Control, Works with Alexa & Google Home, APOLO-27k
Key specs-
maximum flow rate:6.3 Gallons Per Minute
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special features:Wi-Fi Enabled, Self-Modulating, LED Display
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maximum temperature:140 F
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wattage:N/A
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voltage:N/A
9.8Exceptional
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RheemRheem 18kW 240V Tankless Electric Water Heater, Gray
12% Off9.7Exceptional
Our Rating
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4
RheemRheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
30% Off9.5Excellent
Our Rating
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5
FOGATTIFogatti Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Hot Water Heater, with LED Temperature Display, ETL Certified, Up to 4.4 GPM for Residential Whole House Shower
9.3Excellent
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Orbek18kW Tankless Water Heater Electric, ORBEK 240 Volt On Demand Instant Hot Water Heater, with LED Digital Display, ETL Certified, Up to 4.17 GPM for 2-3 Point of Use throughout the Whole House
Key specs-
maximum flow rate:4.8 GPM
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special features:LED Display
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maximum temperature:140°F
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wattage:18 KW
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voltage:240 Volts
9.2Excellent
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WINTEMPElectric Tankless Water Heater WINTEMP, 27kW 240V Whole House Hot Water Supply Shower on Demand Instant Endless Water Heater with LED Temperature Display and WIFI Control, Space-Saving ETL
10% OffKey specs-
maximum flow rate:6.5 Gallons Per Minute
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special features:Overheat Protection, LED Display
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maximum temperature:140 Degrees Fahrenheit
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wattage:27000 watts
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voltage:240 Volts AC
9.1Excellent
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RaneinRanein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Residential Whole House Shower, Space Saving
18% OffKey specs-
maximum flow rate:4.3 GPM
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special features:LED Display
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maximum temperature:131 Degrees Fahrenheit
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wattage:18 KW
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voltage:240 Volts AC
9.0Excellent
Our Rating
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9
SIVUATEKElectric Tankless Water Heater SIVUATEK 18kW, 240V - On-Demand Hot Water for Whole House - ETL Certified, Self Modulating - Compact Design for Easy Installation - for 3 Point of Use Hot Water
Key specs-
maximum flow rate:2.8 GPM
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special features:Standard pipe fittings, Easy control, Touch sensor, Intuitive display
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maximum temperature:120 Degrees Fahrenheit
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wattage:18000 watts
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voltage:240 Volts
8.9Very Good
Our Rating
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10
HNKTankless Water Heater Electric ，110v 0-3500W Whole House Tankless Hot Water Heater with Led Temperature Display for Indoor or Outdoor Black-5 Years Quality Assurance
10% OffKey specs-
maximum flow rate:1.9 Liters Per Minute
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special features:Temperature Lock, Overheat Protection
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maximum temperature:131 Degrees Fahrenheit
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wattage:3500 watts
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voltage:110 Volts
8.8Very Good
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