10 bestElectric Tankless Water Heatersof January 2026
112M consumers helped this year.
1
RINNAI RXP199iN Condensing Tankless Water Heater RXP199 Features 0.96 UEF with 199k BTU and Pump.
Rinnai
9.7
27% off
2
RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.
Rinnai
9.4
3
Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, Small Grey
Rheem
9.1
4
Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White - 23, Gloss White
Stiebel Eltron
8.9
29% off
5
Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater
Rheem
8.6
OtherUp to 23% off
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
CAMPLUX Tankless Electric Water Heaters 18kW, On Demand Hot Water Heater Electric with Digital Display 240V for Shower, White
VEVOR Instant Water Heater, 8kw On Demand Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon ETL Listed
Marey ECO180 Electric Tankless Water Heater, 18kW 240V, Smart Technology, Unlimited On-Demand Hot Water Heater
6
Ranein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Residential Whole House Shower, Space Saving
Ranein
8.3
6% off
7
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Rheem
8.0
8
thermomate Electric Tankless Water Heater, 11kW at 240 Volt, On Demand Instant Hot Water Heater, Self Modulating Energy Saving, Save Space, 2.15GPM at 35°F Rise
thermomate
7.7
9
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, Gray
Rheem
7.4
10
Rheem 11kW 240V Tankless Electric Water Heater
Rheem
7.1
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