10 Best Instant Electric Water Heater in The UK

Last updated on 12/08/2025

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Stiebel Eltron DCE-X Premium Compact Instant Water Heater, Suitable for Showers, Maximum Energy Efficiency, Accurate Temperature delivery, 238158, 220240 V, White, 6/8 kW

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Why We Love It

Advanced 4i technology.
Energy-efficient ECO mode.
User-friendly backlit display.

Main Highlights

Fully electronic compact instantaneous water heater with 4i technology
Maximum energy efficiency and accurate temperature delivery at all times thanks to fully electronic closed-loop control
Easy operation via a large, backlit multifunction display
Particularly energy efficient in ECO mode
High grade design

Sleek white finish.
Highly efficient energy rating.
Convenient neon indicator.

Main Highlights

[𝗨𝗞'𝗦 𝗟𝗘𝗔𝗗𝗜𝗡𝗚 𝗘𝗟𝗘𝗖𝗧𝗥𝗜𝗖 𝗦𝗛𝗢𝗪𝗘𝗥 𝗕𝗥𝗔𝗡𝗗] 🏆 Established in 1975 Triton has grown to become the UK’s best brand for electric showers/ water heaters and built reputation for quality, innovation, and best in class customer service so you can ORDER NOW and feel relief that you have made a safe purchase.
[𝗜𝗡𝗦𝗧𝗔𝗡𝗧 𝗛𝗢𝗧 𝗪𝗔𝗧𝗘𝗥 𝗔𝗖𝗖𝗘𝗦𝗦] 🔥 Optimise your home water heating with our high-efficiency, wall-mounted, instant water heater. Engineered for convenience, this unit seamlessly provides on-demand hot water to either your kitchen sink or a pair of hand basins, ensuring you have access to heated water when and where you need it without the wait.
[𝗘𝗡𝗘𝗥𝗚𝗬 𝗦𝗔𝗩𝗜𝗡𝗚 𝗢𝗣𝗘𝗥𝗔𝗧𝗜𝗢𝗡] 💡 Experience immediate hot water delivery with our energy-saving water heater. Its smart design only consumes power during water flow, eliminating standby energy use and reducing your utility bills. With an A energy rating.
[𝗨𝗦𝗘𝗥-𝗙𝗥𝗜𝗘𝗡𝗗𝗟𝗬 𝗣𝗢𝗪𝗘𝗥 𝗔𝗗𝗝𝗨𝗦𝗧𝗠𝗘𝗡𝗧] 🔄 With intuitive power selection, this model offers a user-friendly interface allowing you to effortlessly adjust to the ideal temperature settings for your comfort.
[𝗘𝗡𝗖𝗛𝗔𝗡𝗖𝗘𝗗 𝗪𝗔𝗧𝗘𝗥 𝗣𝗥𝗢𝗧𝗘𝗖𝗧𝗜𝗢𝗡] 🛡️ Equipped with IP25 ingress protection, our water heater is safeguarded against water exposure, ensuring durability and safe operation.
[1 𝗬𝗘𝗔𝗥 𝗚𝗨𝗔𝗥𝗔𝗡𝗧𝗘𝗘] 🤝 The Triton electrical shower range all come with a minimum of 2 year parts and labour guarantee as standard, For added peace of mind.

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.

4% OffFree Shipping

Why We Love It

Award-winning design and innovation.
Ensures total user safety.
Highly space-saving and efficient.

Main Highlights

Instant electric water heater designed and produced for installation in the UK. Awarded the Good Design Award in 2019
Multi-Point: Aures Multi can supply multiple outlets with hot water (not simultaneously) upon point of use. New Italian premium design
Total Safety: Its Double Pole Earth Leakage Circuit Breaker (ELCB) prevents electric shocks, integrating with a total safety device system that avoids damage to the product. If a dangerous voltage is detected, the device will interrupt the electrical circuit as a safety measure.
Small Size: Aures Multi saves space, no pre-heat time or water storage space required. Aures Multi is ideal for installations in small, narrow spaces like utility rooms, garages, conservatories, kitchens, and bathrooms.
Quick Comfort: The Aures Multi electric instantaneous water heater delivers hot water within seconds due to its effective heating element which heats water instantly.
Easy to Use: Aures Multi includes a user-friendly frontal dial and LED lights which make the product setup incredibly simple. Because of its flow sensor system, the product works only when a tap is open.
Highly Energy Efficient: The product offers a super efficient performance, lower energy usage and emissions, which give it an 'A' class ErP rating. Its 4-step frontal & intuitive power dial can be set to the level the user wants. Aures Multi is incredibly easy to maintain as all internal components can be accessed through the front.

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

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Why We Love It

Instant heating, endless hot water.
Advanced flow control feature.
Convenient temperature control display.

Main Highlights

【2S INSTANT HEATING & ENDLESS HOT WATER】- Turn on the water tap and endless hot water will come out within 2 seconds on demands when require, hence you will never run out of hot water and only pay for what you really use. Savings of up to 50% on water heating costs.
【EXCLUSIVE ADVANCED FLOW CONTROL & WATER LEAKAGE PREVENTION】- Unique technology is applied to improve water flow and prevent any water from splashing or dripping. You can adjust the flow rate you want to meet your needs in any time. Maximum hot water flow rate: 3L/min
【FLEXIBLE INSTALLATION】- When inverting the installation, the numbers automatically flip over. When the electric washbasin is in operation, the LED displays the current water temperature in real time, so you can easily get hot water at the desired temperature. The temperature range of 35 to 55°C can be selected by touch control.
【EXCEPTIONALLY DURATION】- Built in high quality alloy bare heating element, it is corrosion-resistant and acid-resistant; flowing water prevents limescale from building up, which prolongs its service lifespan.
【TWO INSTALLATION APPLICATIONS OPTIONAL】- Functional for both over sink and under sink installation, display will reverse automatically. Act as primary heater, with water being injected from cold mains directly; Act as booster heater, with hot water being injected from a storage tank. It is free to connect to a mixer tap.Water Inlet and outlet sizes G1/2‘’

Instant Electric Water Heater, 220V 3500W Intelligent Mini Electric Water Heater, Tankless Instantaneous Shower Hot Water with LED Temperature Display, for Bathroom Kitchen, Basins Sinks (White)

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Why We Love It

Instant hot water at convenience.
Energy-efficient and compact design.
Safety features for peace of mind.

Main Highlights

[High-Power Instant Water Heater]: Experience instant hot water with our 3500W high-power water heater. Utilizing nickel-chromium wire technology for superior thermal efficiency, it heats water efficiently and uniformly. Perfect for kitchens, bathrooms, or public toilets, providing lasting hot water at your fingertips.
[Compact and Efficient Design]: Elevate your experience with our compact instant electric water heater featuring frequency conversion automatic constant temperature technology. Enjoy intelligent power adjustment based on water inlet and set temperature, ensuring optimal performance, enhanced efficiency, and significant energy savings.
[Innovative Features for Convenience]: Our innovative instant electric water heater features a water pressure switch and water flow switch, perfect for high-rise buildings and water pressure fluctuations. Easy installation, but professional setup is recommended. Prior to initial use, ensure cold water flows through to prevent dry heating. Enjoy hassle-free operation in any setting.
[Premium Quality and Safety]: Indulge in our premium instant electric water heater crafted with high-quality nickel-chrome wire and durable plastic. Boasting anti-corrosion properties, it features leak protection, IPX4 splash resistance, anti-dry burn safety, and water and electrical insulation for your peace of mind. Enjoy top-notch quality and protection in one sleek design.
[Customer-Centric Product Range]: Explore our wide range of water heater products tailored to suit your needs. Your satisfaction is our top priority. Rest assured, if any issues arise post-purchase, contact us promptly via email for proactive assistance in resolving any concerns. Your comfort and satisfaction are our commitment.

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)

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Why We Love It

Instant 24/7 hot water.
Easy remote controlled temperature.
Versatile and safe installation.

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.
【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.
【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.

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)

20% OffFree Shipping

Why We Love It

Instant and sufficient hot water.
Convenient digital display control.
Compact and versatile positioning.

Main Highlights

【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.
【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.
【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
【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
【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
【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.

Mini Electric Instant Water Heater for Sink, Stainless Steel On-Demand Hot Water Water Heater Under Sink, 5500W 220V Point-of-use Compact Water Heaters for Home, Kitchen, Bathroom, Garage(Under Sink)

12% OffFree Shipping

Why We Love It

Compact, space-saving design.
User-friendly digital display.
Efficient, on-demand heating.

Main Highlights

【Mini Tankless Water Hear for Sink】With compact and space-saving design, our small water heater is perfect for small spaces, installs easily under sinks or in compact areas without sacrificing functionality. Powered with 5500W and 230V, it still provides robust hot water flow without compromising on space. Outlet water temperature is varied from 20℃ to 45℃ in general.
【Durable Stainless Steel Housing with Sleek LED Temperature Display and Adjustable Power Settings】The durable stainless steel housing of our vented water heater ensures long-lasting performance and adds a sleek, modern aesthetic that complements any kitchen or bathroom. The LED temperature display provides easy monitoring and precise adjustment for personalized comfort, while the adjustable power settings allow for energy-efficient performance tailored to meet varying hot water needs.
【 Hot Water : 20-45℃ Output, Adjustable Temp】The temperature output of our electric water heater for sink typically ranges from 20°C to 45°C. The hot water discharge temperature varies according to the water temperature entering and the flow volume. Tankless technology ensures energy efficiency by heating water on demand, reducing energy costs and environmental impact.
【Space-Savvy Design &Energy Savings at Its Best】Say goodbye to bulky water heaters. Our sleek and modern water heater fits seamlessly into UK kitchens and bathrooms, maximizing space without compromising functionality. Save more on energy compared to traditional storage heaters, as our on-demand design only heats water when you need it. Green living choice for water conservation and cost-effective heating.
【Both Home and Commercial】 Ideal for households, farms, summer house, cafes, garage, and tool rooms, the instant hot water heater for sink suits diverse needs, ensuring everyone has access to hot water when you need it. Install today and experience the convenience of instant hot water with a modern, efficient solution.

Bellanny Mini Electric Water Heater, 1.5KW 220V Electric Instantaneous Water Tap with 10L Water Tank, IP4X Waterproof Under Sink Water Heater with LCD Digital Display & Temperature Knob, UK Plug

13% Off

Why We Love It

Heats water incredibly fast.
Provides hot water instantly.
Durable stainless steel construction.

Main Highlights

【Fast Heating】 This instant water heater adopts advanced instantaneous heating technology, which heats up quickly and greatly saves time waiting for hot water. The single-piece compact insulation design not only reduces energy consumption, but also ensures a continuous supply of hot water. Whether you are washing up in the morning or bathing in the evening, you can turn on the water immediately and enjoy a comfortable living experience.
【On-Demand Water Supply】 This compact water heater eliminates the long wait for hot water at the sink, allowing you to get hot water on demand whenever you need it. Whether you're washing your hands, face or dishes, it's ready to use, providing convenience and comfort. Whether you are a domestic user or a commercial establishment, this water heater is the ideal choice for you.
【Quality Material】This under sink water heater is made of stainless steel tubes with excellent anti-pollution ability, which can adapt to a variety of complex water quality environments. Whether it is hard water or soft water, it can ensure the long-term stable operation of the water heater and extend its service life. High-quality material selection, so you can use it with confidence and peace of mind.
【Safety & Reliability】 This water heater adopts a one-piece moulding design, effectively preventing erosion in bathroom and kitchen environments. Over-pressure protection function: when the pressure in the liner exceeds the safety rated pressure, the safety relief valve will automatically release the pressure. Dry burn prevention function: when the liner dries out, the secondary insulation protection will immediately cut off the power supply and automatically stop working.
【Flexible Installation】 Compact in size, this small electric water heater can be easily placed in the kitchen, lounge, bathroom or anywhere else you need it. The exquisite design not only saves space, but also blends into various home environments and enhances the overall aesthetics. Whether it is wall-mounted or vertical installation, it can meet your personalised needs and make life more convenient.

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 (White)

15% OffFree Shipping

Why We Love It

Unlimited hot water on-demand.
Efficient, space-saving design.
Ensures multiple security protections.

Main Highlights

[On-demand, Umlimited Hot Water] Briwellna Non-Thermostatic Tankless Electric Water Heater is ideal for a single sensor faucet or a single metering faucet for handwashing and other fixed-flow applications.
[Compact Size Fits Almost Anywhere] This water heater is designed specifically with replacements in mind. The smaller dimensions (210mm×172mm×73mm)makes it easier to swap out your existing less-efficient water heater.
[Flexible Installation in Any Orientation] The product can be installed at any angle and the display will be automatically adjusted when the product is installed upside down.
[Save Energy and Time] Equipped with the latest integral cast aluminum heating technology, this water heater produces instant hot water without storing water, preheating devices or an attemperator, saving power consumption, water, time and space. It can be shut off by turning off water or power supply
[Multiple Security Protection] Smart protection functions protect the product from leakage, over-temperature, dry heating and over-pressure. We offer one-year warranty.
[Easy Installation] Coming with multi-language user's manual, it's easy to install the faucet without plumbers. Video of installation guadiance is available. It can be installed above or under the sink. Please make sure the water pressure required(0.04-0.8MPa) and your breaker panel to dedicate 25A(5500W) double pole breakers solely to the unit. The water connector size is 1/2". Fits both old style 1/2" hose connector and 3/8" water supply system(with adapters).

8.7

Excellent

Save 15%

We scanned 675 products

We reviewed these offers relevant to the Instant Electric Water Heater within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Stiebel Eltron, Triton Showers, Ariston, thermomate, URCheers, YUCHENGTECH, FVSTR, WARMCITY, Bellanny, Briwellna, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Instant Electric Water Heater in the market, we considered we took a deep dive into 3376 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Stiebel Eltron DCE-X Premium Compact Instant Water Heater, Suitable for Showers, Maximum Energy Efficiency, Accurate Temperature delivery, 238158, 220240 V, White, 6/8 kW. We love many things about this product by Stiebel Eltron. What sets it apart from the competition is Advanced 4i technology. , Energy-efficient ECO mode. , User-friendly backlit display.
The best value product for most shoppers and where user satisfaction is continuously the highest is Triton Water Heater | Instaflow | 7.7kW | Electric Water Heater I Instant Water Heater | Tankless Electric Water Heater | Undersink Water Heater | SPINSF07MW | White by Triton Showers based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Instant Electric Water Heater and the best cost-to-value ratio is 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)at FVSTR with a 20% discount.
Our list of the best Instant Electric Water Heater is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Instant Electric Water Heater in The UK

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We scanned 675 products

We concluded that: