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Electric Tankless Water Heater Comparison - September 2025
5 Best Electric Tankless Water Heater In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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Overview: Are you looking for an efficient, reliable and cost-saving water heater? Look no further and check out our comprehensive reviews of electric tankless water heaters! We provide detailed information on the performance, features and cost of each model, so you can make an informed decision.
Instant Electric Tankless Water Heater 220/240V, FVSTR Small Smart Portable Self-Modulating on Demand Use Under Sink Kitchen Household Shower, Hot Water for House Shower [Energy Class A] (7.5KW)
Model
Mini Instant Water Heater Instant Electric Water Heater 3000W Constant Temperature Electric Tankless Water Heater with Remote Control Digital Display for Home Kitchen Bathroom Indoor 220V (White)
Model
Mini Electric Water Heater, 3000W Tankless Instant Hot Water Heater Boiler with LCD Display, Under Sink Basin, Auto Power Off Shower Hot Water System for Kitchen Bathroom Washing (White)
Model
wowspeed 1.5KW Electric Water Heater, 220V 7A Instant Water Heater with Digital Display, Under Sink Tankless Electric Water Heater Suitable for Showers, Water Heat for RV Kitchen Bathroom
Model
3000W Instant Water Heater, Mini Electric Tankless Instant Heater with LED Display, Under Sink Water Heater Constant Temperature for Shower Bathroom Kitchen
Brand
FVSTR
Brand
YUCHENGTECH
Brand
Haofy
Brand
wowspeed
Brand
Luqixcey
Reviews
252 reviews
Reviews
168 reviews
Reviews
294 reviews
Reviews
-
Reviews
-
Tech Specs
product dimensions
40.64 x 25.4 x 12.7 cm 2.42 kg
product dimensions
26 x 26 x 10 cm 1.8 kg
product dimensions
13.5 x 0.03 x 16 cm 1.16 kg
product dimensions
28 x 26 x 28 cm
product dimensions
11.6 x 11.6 x 19.8 cm 1.15 kg
color
White
color
White
color
White
color
White
color
White
item weight
2.42 kg
item weight
1.8 kg
item weight
1.16 kg
item weight
-
item weight
1.15 kg
wattage
7000 watts
wattage
3000 watts
wattage
3000 watts
wattage
1.5E+3
wattage
-
batteries required
No
batteries required
No
batteries required
No
batteries required
-
batteries required
No
special features
Overheat Protection
special features
Digital Display
special features
-
special features
Portable
special features
-
batteries included
No
batteries included
No
batteries included
No
batteries included
-
batteries included
-
included components
electric tankless water heater
included components
-
included components
-
included components
Instruction manual
included components
Instant Hot Water Heater
voltage
240 Volts
voltage
220 Volts AC
voltage
-
voltage
2.2E+2 Volts AC
voltage
-
customer reviews
3.7 3.7 out of 5 stars 84 ratings 3.7 out of 5 stars
customer reviews
3.3 3.3 out of 5 stars 56 ratings 3.3 out of 5 stars
customer reviews
3.2 3.2 out of 5 stars 98 ratings 3.2 out of 5 stars
Here are the top 3 recommended products with more information to help you find the right product for you
9.6
1
FVSTR
20% Off
Instant Electric Tankless Water Heater 220/240V, FVSTR Small Smart Portable Self-Modulating on Demand Use Under Sink Kitchen Household Shower, Hot Water for House Shower [Energy Class A] (7.5KW)
Why we love it
Instant hot water, no waiting.
Energy-efficient with 98% efficiency.
Compact design, easy installation.
Main highlights
【Simple Installation】1/2-Inch Water heater connector. In order to install whole house tankless water heater electric 7.5KW 240V it requires 240 Voltage, 2 x Double-POLE 30AMP, wire gauge 2 x 8AWG, please check to confirm that your breaker panel meet these specifications. 2-year limite warranty and 24/7 customer support services
【SMART SELF ADJUSTMENT】 The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
【SAFE and DURABLE】 Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come..POINT of USE The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste
【REMOTE CONTROL】 The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. The model comes with Remote control, useful for installation under sink.
【Installation Note】that the approval of the relevant distribution network operator (DNO) is required for installation and that the installation of the products may only be carried out by the distribution network operator itself or by an installation company entered in the operator's list of installers.
【Installation Note】that the approval of the relevant distribution network operator (DNO) is required for installation and that the installation of the products may only be carried out by the distribution network operator itself or by an installation company entered in the operator's list of installers.
【Installation Note】that the approval of the relevant distribution network operator (DNO) is required for installation and that the installation of the products may only be carried out by the distribution network operator itself or by an installation company entered in the operator's list of installers.
【INSTANT HOT WATER HEATER 】- Applied with 7500W/11000W heating system, the electric tankless water heater supplies instant hot water, 3 seconds to get hot water without preheating. Instant consistent and endless hot water of the maximum temperature reach to 55℃/131℉. It is perfect companion for sinks, bringing you perfect experience of comfort and relaxing
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9.4
2
YUCHENGTECH
Mini Instant Water Heater Instant Electric Water Heater 3000W Constant Temperature Electric Tankless Water Heater with Remote Control Digital Display for Home Kitchen Bathroom Indoor 220V (White)
Why we love it
Fast heating, no preheating needed.
Compact, versatile installation options.
Safe with multiple protection features.
Main highlights
【Timely Hot Water Supply】: 3000W power heating system can quickly get hot water without preheating. The highest temperature reaches 55°C/131°F. It is hot as soon as it is opened, and hot water is supplied 24 hours a day, responding to your water demand at any time, bringing you a perfect experience of comfort and relaxation.
【Safer to use】: Instant electric hot water heater have a variety of safety protection functions, water and electricity isolation, IPX4 waterproof, leakage protection, dry heating protection, over-temperature and inactive state automatic power-off. Use water safely and securely.
【Easy to operate】: The temperature can be adjusted by remote control and touch. Equipped with digital display and touch control panel, LED screen displays the current temperature in real time. The temperature can also be adjusted through the remote control. The operation is very simple and very convenient.
【360° Free Installation】: The body of the hot water heater is small and does not take up space. It can be installed upside down, lying down, hanging upright, and tilted. It can be used for the installation of wash cabinets in the bathroom, under the sink, beside the washing machine, etc., to meet different needs.
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9.1
3
Haofy
33% Off
Mini Electric Water Heater, 3000W Tankless Instant Hot Water Heater Boiler with LCD Display, Under Sink Basin, Auto Power Off Shower Hot Water System for Kitchen Bathroom Washing (White)
Why we love it
The product heats water immediately, so you dont have to wait or waste water.
It has a large LCD screen that makes it easy to see and use.
It is safe to use with its built in leak protection and overheating protection.
Main highlights
【Note】You'd better install this item vertically to ensure long service time.About incoming and outgoing water volume problem, the heating function cannot be turned on when the water pressure is too low, the hot water pressure is too high, and the hot water is small to have hot water.6. The outlet water temperature is affected by the water temperature and the size of the water flow.
【Large LCD Screen】 The Thermoflow water heater without a water tank is equipped with a backlit LCD screen and a touch screen, which can easily carry hot water at commercial temperatures of 86 ° F (30 ° C) to 131 ° F (55 ° C) For commercial applications.
【Immediate Heating】 it is not necessary to save water, just heat it after 3 seconds. Tankless water heaters provide a continuous of hot water, heating only the required water. One-button operation, easy to transport
【Ensure Safety】 Built-in leakage protection device. It turns off automatically due to overheating, it turns off automatically when it does not work
【Constant Temperature】 This electric temperature control device guarantees a constant output temperature even if the rate changes from top to bottom. It can be installed in the kitchen, living room, bathroom or any other desired place
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Our ranking system
The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria. We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. TopChoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.
Features
Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.
Consumer Reviews
We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.
Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
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9.6
1FVSTR20% Off
Instant hot water, no waiting.
