10 bestTankless Hot Water Heatersof October 2025
112M consumers helped this year.
19% off
1

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

9.9
2

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

9.8
24% off
3

Tankless Water Heater Electric 27kW 208~240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display for Residential Whole House Shower, 114A Gray
thermomate

9.7
4

VEVOR Instant Water Heater, 18kw Electric Tankless Water Boiler, Digital Temperature Display & Easy Installation & 24-Hour Water Supply, for Kitchen Bathroom Shower Mall Salon Shampoo ETL Listed
VEVOR

9.5
5

RINNAI Ru Series Sensei Se+ Tankless Hot Water Heater: Indoor Installation
Rinnai

9.4
OtherUp to 14% off
6

Rheem 11kW 240V Tankless Electric Water Heater
Rheem

9.2
7

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

9.0
14% off
8

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

8.8
30% off
9

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

8.6
10

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

8.4

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