10 Best Instant Electric Water Heater in The UK

Last updated on 20/05/2025

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Stiebel Eltron DCE-X Premium Compact Instant Water Heater, Suitable for Showers, Maximum Energy Efficiency, Accurate Temperature delivery, 238159, 220240 V, White, 10/12 kW

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Why We Love It

Energy efficiency at its best.
Accurate temperature delivery always.
Easy and efficient operation.

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

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)

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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).

Electric Water Heater 2.5kw 240v Instant Water Heater 2.5kw 240v 3.0 Gallon on Demand Water Heater with Digital Temperature Control,Smart Control Point of Use (Upper- 10L) (Grey-10L)

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Why We Love It

Compact design saves space.
Adjustable high-temperature limit.
Simple and easy installation.

Main Highlights

Compact and Versatile Design: The VINABUKS Electric Water Heater features a smart 3.3-gallon (15L) tank, perfect for point-of-use applications. Its compact size fits effortlessly under sinks, making it ideal for kitchens, bathrooms, utility rooms, offices, and RVs. This space-saving design ensures hot water is always within reach.
Instant Hot Water: Experience the convenience of immediate hot water at your fingertips. This water heater offers a fast recovery rate, providing instant hot water whenever you need it. The efficient 120V US safety plug ensures safe and reliable performance.
Complete Installation Kit Included: This water heater comes with all necessary accessories for a seamless installation, including 2 PCs compression stainless steel water hoses, 1 pressure relief valve, and 1 tee fitting. The user-friendly design ensures a quick and easy setup process.
High Energy Efficiency: Equipped with advanced insulation materials and a high-efficiency design, the VINABUKS water heater minimizes heat loss and maximizes energy savings. Its rapid heating capability ensures you get hot water on demand, reducing energy consumption and saving on your utility bills.
Durable and Safe Construction: Built to last, the VINABUKS water heater features a high-quality stainless steel tank and a leak-proof design. It includes multiple safety features such as overheat protection and a pressure relief valve. With reliable customer support, you can trust in its long-term safety and performance.

Mini Electric Instant Water Heater for Sink, Stainless Steel On-Demand Small Vented Undersink Water Heater, 5500W 220V Point-of-use Compact Geyser for Home, Kitchen, Bathroom, Garage(Silver)

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Why We Love It

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

Main Highlights

Compact Design: This tankless water heater has a sleek, water heater for sink,cylindrical shape that is ideal for space-constrained areas. The cylindrical shape optimizes vertical space, allowing you to maximize available area. Its compact size enables installation in tight spaces or under sink installations, freeing up valuable storage and counter space. This makes it an ideal choice for small apartments or homes with limited room.
Digital Display: Unleash the convenience of our state-of-the-art electric water heater, where a user-friendly digital display comes to the fore. Its intuitive interface prominently displays the current temperature, granting you the precision you need for tailored water temperature control at a glance. This sleek design ensures a seamless experience, bringing control and comfort to your daily routines.
Intelligent Frequency Conversion Design: Indulge in the convenience of our intelligent electric water heater, featuring a cutting-edge frequency conversion design. Easily regulate the water temperature to suit your preferences, from a refreshing 20°C to a warm 50°C. In spring and summer, you’ll appreciate its energy-saving efficiency without any sauna-like heat, ensuring a gentle, low-power performance. As the weather turns cooler, our heater swiftly delivers high-power, rapid heating, letting you enjoy hot water without the waiting times typically associated with traditional systems.
Efficient and Effortless Hotness: Unlike traditional tank-based systems that store and reheats water, this tankless model heats water on-demand. This means the water is instantaneously heated as it flows through, ensuring you never have to wait for tepid water again. It saves you energy by only consuming power when you’re actively using it, promoting eco-friendliness and cost-effectiveness.
Durable Construction and Maintenance-Friendly: Crafted from high-quality stainless steel, this heater is built to withstand daily use. With a tankless design, you don’t have to worry about regular water storage maintenance. The compact nature also simplifies cleaning, as there’s no hard-to-reach tank to clean or replace.

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)

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Why We Love It

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

Main Highlights

【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
【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 11KW 240V it requires 240 Voltage, 2 x Double-POLE 60AMP, 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

Luqixcey Electric Water Heater 220V 6000W, Under Sink Instant Tankless Water Heater With 30-55℃ Adjustable Temperature, Remote Control, 2 Modes for Kitchen, Bathroom

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Why We Love It

Instant heating, no waiting.
Smart energy-saving technology.
Comprehensive safety features included.

Main Highlights

【6000W Instant Water Heater】This under sink water heater boasts a maximum power of 6000W, providing instant heating that can raise the water temperature to 40°C in just 5 seconds, with a maximum temperature of 55°C. Once heated to the desired temperature, it will automatically maintain a constant temperature. It has two operating modes, variable frequency and fixed power, offering energy efficiency and high performance to meet various water usage needs.
【Smart Variable Frequency Temperature Control Mode】Our instant water heater features a smart variable frequency temperature control function, allowing manual temperature adjustment between 30~55°C. The power of the water heater can also be automatically adjusted based on the temperature to achieve optimal operation. This not only meets temperature requirements but also ensures efficient energy saving.
【Rated Power Mode】This water heater also offers a rated power mode. In standby mode, long press the UP key to adjust the power between 3500, 4500, and 5500W. In the on state, continue long pressing the power key to enter the gear mode, where you can adjust the power between 1 to 5 levels. Fixed power is more suitable for scenarios that require a stable supply of hot water for extended periods.
【Multi-function Digital Display & Two Control Methods】This electric water heater is equipped with a high-definition digital display screen, which can clearly show information such as water temperature, water flow, and incoming water temperature. We also provide two control methods, touchscreen control and remote control, allowing you to adjust the water temperature and the water heater's switch according to your needs at any time.
【8-layer Safety Protection】Our tankless water heater comes with comprehensive safety protection features, including double insulation, dry burn prevention, water-electricity separation, grounding protection, over-voltage protection, constant temperature anti-scalding, IPX4 waterproof rating, and over-temperature protection. These safety measures ensure the water safety for you and your family.
【Integrated Molded Cast Aluminum Heating Element】This portable water heater adopts an integrated molded cast aluminum heating core, which combines a 304 stainless steel waterway with integrated die-casting, and separates the circuit and the inlet and outlet to achieve water-electricity separation. This not only ensures safety but also enhances the stability of heating.

Mulcort Instant Electric Water Heater 220V 3000W,Mini Tankless Water Heater with LCD Display,Mini Water Heater Stainless Steel Heating Element,Under Sink Water Heater for Kitchen Sink Washing

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Why We Love It

High efficiency for quick heating.
Adjustable temperature for convenience.
Safe and eco-friendly operation.

Main Highlights

It is a high efficient water heater with compact size to produce the hot water very quickly.
Freely adjust water temperature by water flowing, simple operation.
Safe heater, electricity saving, water saving, no pollution, no exhaust gas.
ABS construction with mini design, it is High quality, elegant and fashionable.
This is a water heater for the application of changing the cold water into hot water and it will meet your various needs such as used in kitchen, bath room, public restroom, etc.

Btstil Instant Electric Water Heater, 3500W Mini Electric Water Heater, Intelligent Instantaneous Water Heater Heater with Temperature Display for Bathroom Kitchen, UK Plug (White)

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Why We Love It

Compact size fits anywhere.
Intelligent automatic temperature adjustment.
Professional installation recommended.

Main Highlights

【Small & Space-saving】：The mini water heater body can be held in one hand, and 360 degree free installation, can meet your different needs. One-button instant heating, hot water at any time, the temperature of which can reach up to 50 degrees.
【LED Indicator】：With the high heating power of 3.5w, only 2 seconds of hot water, according to the water inlet and the set temperature, intelligent automatic adjustment of the power. LED indicator to show power and heating status.
【Convenient & Efficient】：It is a high-efficiency mini water heater with compact size, very convenient to install and use. Made of high quality ABS material, which is rustproof, anti-corrosion, elegant and fashionable.
【Fast Heating】：Equipped with a built-in turbo heating part and a drain valve, the heating system is designed, double start switch with water pressure switch + water flow switch, you can use it safely and reliably with the faucet in your kitchen, bathroom and public toilet for fast hot water.
【Caution Measures】：This is a kind of instant heating, and the temperature can only be controlled by adjusting the size of the water flow. Installation is easy, but professional installation is highly recommended. Before connecting the power for the first time, make sure that cold water is flowing through the device to avoid dry heat.

Instant Electric Water Heater, 3500W Intelligent Mini Instantaneous Heater Without Tank with Temperature Display for Bathroom Kitchen, UK Plug (White)

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Why We Love It

Space-saving and versatile installation.
Impressive heating efficiency.
Smart temperature regulation.

Main Highlights

💦This instantaneous water heater is small and space-saving. 360° can be installed arbitrarily without taking up space and can meet your different needs. This water heater can heat up to 50°C. Since the temperature depends on the amount of water in the water heater, the temperature rises faster when the water flow is low. If you use it in winter, please adjust the water flow if the water temperature is not enough.
💦This is a water heater that turns cold water into hot water. The 3500 W high-performance instantaneous water heater heats water efficiently, evenly and permanently. This type of water heater is widely used in kitchen, bathroom or public toilet faucet to heat water instantly.
💦Adopting nickel-chromium wire technology, the thermal efficiency is higher than ordinary heating pipes, not easy to scale. This water heater does not need to store water and only starts working when hot water is needed, saving electricity and water. Stable use even with low water pressure
💦Frequency conversion automatic constant temperature intelligent identification function, according to the water inlet and the set temperature, intelligent automatic adjustment of the power, so that the use effect is better, more power and water saving. Digital LCD temperature display.
💦Water pressure switch + water flow switch: double start switch, easy to deal with high-rise / old building / peak water consumption. Note: Installation is easy, but professional installation is highly recommended. Before connecting the power for the first time, make sure that cold water is flowing through the device to avoid dry heat.

Instant Water Heater, 3000W Electric Tankless Fast Heating Water Heater with LCD Digital Display and Touch Button, Portable Mini Instant Water Heater, Under Sink Water Heater for Kitchen, Bathroom

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Why We Love It

Instant hot water on demand.
Safe and durable construction materials.
User-friendly controls and display.

Main Highlights

【Convenient and Efficient Water Heater】The electric water heater with 3000W heating system, provides tankless instant, continuous hot water without waiting for preheating, meeting daily hot water needs. Temperature range: 25℃- 50℃.
【High Quality Material】Our water heater are made of high quality ABS material, standard international G 1/2" pipe connection in fine brass, which is compact and durable, water and electricity are separated for safe and reliable use.
【LED Digital Display & Two Control Methods】This electric water heater is equipped with a high-definition digital display screen, which can clearly show water temperature. We also provide two control methods, touchscreen control and remote control, allowing you to adjust the water temperature and the water heater's switch according to your needs at any time.
【Safety Protection】Our tankless water heater comes with comprehensive safety protection features, including double insulation, anti-dry burn protection, grounding protection, over-voltage protection, water and electricity isolation protection, IPX4 shower and splash-proof protection,These safety measures ensure the water safety for you and your family.
【Wide Applications】The instant water heater shower size: 21cm, Ultra slim and smooth appearance design, beautiful and elegant. The water heater has a voltage of 110V, a power of 3000W, easy to install and easy to use. Ideal for use in bathrooms, kitchens, laundry rooms and other areas where a reliable supply of hot water is required.

8.7

Excellent

We scanned 394 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, Briwellna, VINABUKS, WARMCITY, FVSTR, Luqixcey, Mulcort, Btstil, CJHZQYY, Nastopee, 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 1971 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, 238159, 220240 V, White, 10/12 kW. We love many things about this product by Stiebel Eltron. What sets it apart from the competition is Energy efficiency at its best. , Accurate temperature delivery always. , Easy and efficient operation.
The best value product for most shoppers and where user satisfaction is continuously the highest is 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) by Briwellna 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 Stiebel Eltron DCE-X Premium Compact Instant Water Heater, Suitable for Showers, Maximum Energy Efficiency, Accurate Temperature delivery, 238159, 220240 V, White, 10/12 kWat Stiebel Eltron with a 38% 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 394 products

We concluded that: