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Bosch Electric Water Heater Comparison - April 2026

5 Best Bosch Electric Water Heater In the UK

1
Best Choice
9.8Exceptional
2
9.7Exceptional
3
Best Value
9.4Excellent
4
9.3Excellent
5
9.2Excellent
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Model

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.
Model
Bosch Thermotechnik Tronic 4000 EB Electronic Instantaneous Water Heater, Over-Desk Device, Pressure-Resistant, Suitable for Group Supply, Energy Class A, 18 kW, White
Model
Ariston ANDRIS R 10 L Undersink Electric Water Heater, 2kW Control Unit, B class ErP rating, Economy “E” Setting, Manufactured to be installed in UK - 3100863.
Model
Bosch Thermotechnology Tronic 4000 Electric Tankless Water Heater, 10.5 kW, 13 x 8.5 x 4.5, White
Model
Bosch Thermotechnology Tronic 4000 Electric Tankless Water Heater, 6.5 kW, White

Brand

Ariston
Brand
Bosch
Brand
Ariston
Brand
Bosch Thermotechnology
Brand
Bosch Thermotechnology

Reviews

390 reviews
Reviews
8 reviews
Reviews
112 reviews
Reviews
-
Reviews
-

Tech Specs

product dimensions

30.4 x 30.4 x 22 cm 2.02 kg
product dimensions
12.2 x 23.6 x 48.3 cm 3.32 kg
product dimensions
29.8 x 29.8 x 38.5 cm 7.19 kg
product dimensions
-
product dimensions
21.59 x 21.59 x 33.02 cm 2.36 kg

item weight

2.02 kg
item weight
3.32 kg
item weight
7.19 kg
item weight
-
item weight
2.36 kg

color

White
color
White
color
White
color
White
color
White

special features

-
special features
Easy Installation
special features
Fast Heating
special features
-
special features
Lightweight

included components

User Manual and Instructions Manual
included components
Device
included components
-
included components
-
included components
-

wattage

9.5 KW
wattage
18 KW
wattage
-
wattage
-
wattage
-

item package quantity

1
item package quantity
1
item package quantity
-
item package quantity
-
item package quantity
-

Available On

Available On
Available On
Available On
Available On

Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you
  • 9.8
    1
    Ariston
    25% Off

    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.

    Why we love it

    Instant hot water delivery.
    Compact, space-saving design.
    High energy efficiency.
    Main highlights
    • 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.
    • Multi-Point: Aures Multi can supply multiple outlets with hot water (not simultaneously) upon point of use. New Italian premium design
    • Instant electric water heater designed and produced for installation in the UK. Awarded the Good Design Award in 2019
    • 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.
    • 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.
  • 9.7
    2
    Bosch

    Bosch Thermotechnik Tronic 4000 EB Electronic Instantaneous Water Heater, Over-Desk Device, Pressure-Resistant, Suitable for Group Supply, Energy Class A, 18 kW, White

    Main highlights
    • Quick and easy to mount thanks to the Clickfix plus mounting technology
    • Product data: 3.42 kg – 483 x 236 x 115 mm – 400 V – Installation method: hanging – Colour: white
    • Predecessor: DE18307M
    • High economy - the device saves up to 20% energy and water compared to hydraulically controlled instantaneous water heaters
    • Economical electric instantaneous water heater of energy class A - safety tested by VDE testing institute
    • Closed oversink water heater with fixed connection
    • 18kW Electric Multi Supply Water Heater for Showers and Bathrooms
    • 1. Installation Note: Can only be installed by an authorised craftsman
  • 9.4
    3
    Ariston
    20% Off

    Ariston ANDRIS R 10 L Undersink Electric Water Heater, 2kW Control Unit, B class ErP rating, Economy “E” Setting, Manufactured to be installed in UK - 3100863.

    Why we love it

    Optimizes energy with economy setting for comfort.
    Durable titanium enamelled tank prevents corrosion.
    Compact design fits under sinks easily.
    Main highlights
    • €œB†class ErP rating
    • Water heater designed and manufactured to be installed in UK
    • Titanium enamelled tank for durability: This premium quality water heater the best tank protection with the properties of titanium, wich constitutes a perfect shield against corrosion. Every single component is developed to ensure longlasting high performance with the guarantee of Ariston Brand
    • Maximum Comfort: Andris series products are able to keep the water hot for a long time thanks to the thick high-density polyurethane insulation placed in the tank and the outside of the water heater. It provides an effective barrier against heat losses, optimizing both the performance of the product and the users†comfort. The models of the Andris series are equipped with an immersion thermostat, which allows a very precise adjustment of the water temperature, heating it to the desired point
    • Installation kits to be purchased separately
    • Economy' setting on the dial to optimise comfort and energy saving

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Features

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Consumer Reviews

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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.
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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.