10 Best Instant Electric Water Heater in The UK

Last updated on 29/04/2025

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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

29% OffFree Shipping

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).

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.

Electric Hot Water Heater 110/120V Small Compact Tank Storage,Rv Tr 3.0 Gallon Trailer 1.5KW Kitchen Instant Under Sink Counter Cupboard, RV 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hose 11L

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Why We Love It

Quick heating saves you time.
Large capacity meets daily needs.
Keeps warmth for longer.

Main Highlights

💧 Point of Use Design The GEESEN 3.6 GALLON Electric Water Heater is designed to provide immediate hot water at various points of use, making it ideal for homes, offices, and small commercial settings.
👌 Adjustable Thermostat Equipped with a precise adjustable thermostat, this water heater allows you to set and maintain the perfect water temperature for your needs, ensuring comfort and energy efficiency.
🔌 Standard electrical connection , this water heater is easy to install without the need for specialized electrical work, fitting seamlessly into most residential and light commercial environments.
🏠 Compact and Durable Its compact design saves space, making it suitable for installation in tight spots. The stainless steel construction ensures durability and resistance to corrosion, providing a long-lasting hot water solution
💧 Drain Valve Includes a built-in drain valve for easy maintenance and hassle-free water drainage. This feature simplifies the process of cleaning and maintaining the unit, prolonging its operational life.
🔧 Easy Installation The compact and versatile design allows for straightforward installation in various locations. Detailed installation instructions are included, ensuring a hassle-free setup process.
🍃Save Money $:The 1.5KW power rating ensures low energy consumption, reducing electricity bills without compromising performance.Designed to provide maximum efficiency with minimal energy usage, making it an economical choice for your hot water needs.Unique insulation technology enables your thermal energy to last longer without wasting a penny，We are truly an environmental protection product

VINABUKS 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)

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Why We Love It

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

Main Highlights

* * Instant Hot Water: VINABUKS Electric Tank Water Heater operates with a 1440W power for heating, utilizing an L-shaped heating rod to maximize heat exchange with water in the tank. The 310S stainless steel enhances heat transfer efficiency, meeting your hot water needs.
* * Long Lifespan: The main material is coated with smooth enamel, with a uniform 0.8mm thick German-made enamel layer on the tank surface, effectively preventing corrosion, rust, and leaks. The water heater features an integrated magnesium rod to protect the tank.
* * Space-Saving: Designed with a compact and streamlined form. It can be wall-mounted, placed under the sink and countertop, making it suitable for RVs and camping as well.
* * Safety Protection: CE certified. A high-temperature limit device shuts off heat and provides protection when the temperature reaches 167 °F. It includes a T&P valve for high water pressure protection. Also, the temperature is adjustable within a range of 35°c to 75°c.
* * Easy Installation: Water connection: 1/2" ; Electrical requirements: 240 Volts (AC), 1440 watts under voltage;With plug connection; Maximum water pressure: 150 PSI; Recommended circuit breaker specification: 15 AMPS, ensuring complete electrical safety. VINABUKS provides a 6-year limited warranty for the tank and a 1-year warranty for components, giving you peace of mind.

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.

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

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.

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.

18% 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.

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

7% OffFree Shipping

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.

FVSTR 2.5KW 230v UK Plug 8L Electric Undersink Water Heater for Home, Electric Instant Hot Water Heater with Copper Heating Element, Compact Design, Ideal for Kitchen Installation.

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Why We Love It

Powerful and efficient performance.
Saves energy and money.
Easy installation process.

Main Highlights

💧 Point of Use Design The FVSTR 2.16 GALLON Electric Water Heater is designed to provide immediate hot water at various points of use, making it ideal for homes, offices, and small commercial settings.
👌 Adjustable Thermostat Equipped with a precise adjustable thermostat, this water heater allows you to set and maintain the perfect water temperature for your needs, ensuring comfort and energy efficiency.
🔌 Standard 120-volt electrical connection , this water heater is easy to install without the need for specialized electrical work, fitting seamlessly into most residential and light commercial environments.
🏠 Compact and Durable Its compact design saves space, making it suitable for installation in tight spots. The stainless steel construction ensures durability and resistance to corrosion, providing a long-lasting hot water solution
💧 Drain Valve Includes a built-in drain valve for easy maintenance and hassle-free water drainage. This feature simplifies the process of cleaning and maintaining the unit, prolonging its operational life.
🔧 Easy Installation The compact and versatile design allows for straightforward installation in various locations. Detailed installation instructions are included, ensuring a hassle-free setup process.
🍃Save Money $:The 1.5KW power rating ensures low energy consumption, reducing electricity bills without compromising performance.Designed to provide maximum efficiency with minimal energy usage, making it an economical choice for your hot water needs.Unique insulation technology enables your thermal energy to last longer without wasting a penny，We are truly an environmental protection product

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, WARMCITY, GEESEN, VINABUKS, Btstil, Bellanny, Ariston, Luqixcey, FVSTR, 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 29% 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: