10 bestElectric Tankless Water Heaterof June 2026
112M consumers helped this year.
5% off
1
STIEBEL ELTRON DCE-X 10/12 kW Premium Water Heater, Compact Size, tankless, instantaneous, Suitable for Showers, 220/240 V, Precise Temperature Output, oversink Installation, 238159
Stiebel Eltron
10.0
2
Stiebel Eltron DCE-X 6/8 Premium Compact Instant Water Heater, Suitable for Showers, Maximum Energy Efficiency, Accurate Temperature delivery, 238158, 220240 V, White
Stiebel Eltron
10.0
3
Stiebel Eltron DCE-S 6/8 Plus Compact Instant Water Heater, Suitable for Showers, Precise Temperature Selection from 20 °C to 60 °C, 238153, 220240 V, White, kW
Stiebel Eltron
9.9
22% off
4
Triton Showers SPT303I T30I handwash Water Heater, White
Triton Showers
9.6
5
Bosch Thermotechnology Tronic 6100 Electric Tankless Water Heater, 27 kW, White
Bosch Thermotechnology
9.3
OtherUp to 17% off
Bosch Thermotechnology Tronic 4000 Electric Tankless Water Heater, 3.5 kW, 13 x 8.5 x 4.5, 3500 watts, White
ThermoMate ELEX5.5 Instantaneous Electric Water Heater with LED Display, 5.5kW Hand Wash Water Heater for Basins Sinks, Over/Under Sink Water Heaters, Hard Wire 220V
EcoSmart 220V 8.0 KW Electric Tankless Water Heater-7.3KW TANKLSS H20 Heater
DeXpro Inline Electric Instant Water Heater, Tankless Hot Water Dispenser, Oversink/Undersink Installation Ideal for Commercial Use, Digital Temperature Control (3.5kW DXI35DT)
6
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater, White
Ecosmart
9.1
20% off
7
Ariston AURES Multi Electric Instantaneous Water Heater 9.5kW, Multi-Point, Compact Size, ELCB System, User-Friendly and A Energy Rated. Manufactured to be Installed in UK – 3195216.
Ariston
8.8
8
STIEBEL ELTRON instant electric hot water heater
Stiebel Eltron
8.5
9
Rheem 18kW 240V Tankless Electric Water Heater
Rheem
8.2
10
Briwellna Electric Instantaneous Tankless Water Heater 5.5kW 220V, Instant Hot Water Heater with Digital Display for Kitchen Bathroom Sink Counter Under/Above Home Indoor (Cream)
Briwellna
8.0
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A Guide to Selecting the Best Electric Tankless Water Heater
Choosing the right electric tankless water heater can significantly impact your comfort and energy efficiency. These devices heat water on demand, which means you won't run out of hot water and you can save on energy costs. However, selecting the right model involves understanding several key specifications to ensure it meets your household needs. Here’s a guide to help you navigate through the essential specs and make an informed decision.
Flow Rate (GPM)
Flow rate, measured in gallons per minute (GPM), indicates how much hot water the heater can produce at a given time. This is crucial because it determines whether the heater can meet your household's hot water demands. For instance, a higher GPM is necessary for larger households or if you plan to run multiple hot water outlets simultaneously (like a shower and a dishwasher). Typically, a flow rate of 3-5 GPM is suitable for small to medium households, while larger homes may require 6-10 GPM or more.
Temperature Rise
Temperature rise refers to the difference between the incoming water temperature and the desired output temperature. This is important because it affects the heater's ability to provide sufficiently hot water. If you live in a colder climate where the incoming water temperature is low, you'll need a heater that can handle a higher temperature rise. Generally, a temperature rise of 50-70 degrees Fahrenheit is adequate for most households, but you may need more if your incoming water is particularly cold.
Power (kW)
The power rating, measured in kilowatts (kW), indicates the electrical power the heater uses to heat the water. This is important for understanding the heater's efficiency and capacity. Higher kW ratings typically mean the heater can provide more hot water and heat it faster. For small households or single-point applications, a lower power rating (around 10-15 kW) may suffice. Larger households or whole-house applications might require a higher power rating (20-30 kW or more).
Energy Efficiency
Energy efficiency measures how effectively the heater converts electrical energy into hot water. This is important for reducing energy consumption and lowering utility bills. Look for models with high energy efficiency ratings, often indicated by a percentage. Most modern electric tankless water heaters have efficiency ratings of 90% or higher. Choosing a model with a higher efficiency rating can lead to significant savings over time.
Installation Requirements
Installation requirements include the electrical and plumbing specifications needed to install the heater. This is important to ensure compatibility with your home's existing infrastructure. Check the voltage and amperage requirements, as well as the type of circuit breaker needed. Some models may require professional installation due to their complexity. Make sure your home can accommodate the installation requirements to avoid additional costs or complications.
Size and Space
The physical size of the heater and the space available for installation are important considerations. Tankless water heaters are generally compact, but you need to ensure there is enough space for proper ventilation and maintenance. Measure the installation area and compare it with the dimensions of the heater. This will help you choose a model that fits comfortably in your designated space without causing any issues.
Warranty and Support
Warranty and customer support are important for ensuring long-term satisfaction with your purchase. A good warranty can provide peace of mind and protect you from unexpected repair costs. Look for models with comprehensive warranties that cover both parts and labor. Additionally, consider the availability of customer support and service centers in your area. This can be crucial if you encounter any issues with your heater.
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