10 bestElectric Tankless Water Heatersof September 2025
112M consumers helped this year.
1

RINNAI RXP199iN Condensing Tankless Water Heater RXP199 Features 0.96 UEF with 199k BTU and Pump.
Rinnai

9.9
2

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, Small Grey
Rheem

9.8
3

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

9.7
4

CAMPLUX Tankless Electric Water Heaters 18kW, On Demand Hot Water Heater Electric with Digital Display 240V for Shower, White
CAMPLUX ENJOY OUTDOOR LIFE

9.5
14% off
5

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Rheem

9.3
OtherUp to 18% off
6

Ranein Electric Tankless Water Heater, 11Kw 240v,Instant Hot Water Heater with LED Temperature Display, Energy Saving, Save Space
Ranein

9.1
14% off
7

RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.
Rinnai

8.9
8

Marey ECO150 Electric Tankless Water Heater, 14.5kW 240V, Smart Technology, Unlimited On-Demand Hot Water Heater
MAREY

8.6
10% off
9

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

8.4
10

Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White - 23, Gloss White
Stiebel Eltron

8.2

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