10 bestTankless Hot 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
9.9
15% off
2
RINNAI Ru Series Sensei Se+ Tankless Hot Water Heater: Indoor Installation
Rinnai
9.8
27% off
3
RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.
Rinnai
9.6
4
Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, Small Grey
Rheem
9.4
5
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
9.1
OtherUp to 29% off
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
Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater
Stiebel Eltron 12 Trend Tempra, Tankless Water Heater, White
Rheem 11kW 240V Tankless Electric Water Heater
6% off
6
Rinnai RUCS65IP Ultra Series Tankless Water Heater, White
Rinnai
8.9
7
Rinnai RE140iP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Rinnai
8.6
8
Rinnai V53DeN Natural Gas Tankless Hot Water Heater, 5.3 GPM, Outdoor Installation
Rinnai
8.4
9
RINNAI V Series He Tankless Hot Water Heater: Indoor Installation
Rinnai
8.1
10
Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White - 23, Gloss White
Stiebel Eltron
7.8
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