Advertising Disclosure Unvented Hot Water Cylinders Comparison - April 2026
4 Best Unvented Hot Water Cylinders 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. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
Advertising Disclosure
| 1 Best Choice  9.7Exceptional | 2  9.6Exceptional | 3  9.3Excellent | 4  9.0Excellent |
| View DealOn Amazon | View DealOn Amazon | View DealOn Amazon | View DealOn Amazon |
ModelAriston PRO1 ECO 50 L Electric Storage Water Heater with A 50 L, Inclusive Of Unvented Kit, B Class Erp Rating, Waterplus Technology, Manufactured To Be Installed In UK - 3820019. , White | Model TESY BiLight 120 Litre Electric Hot Water Cylinder Low Cost Energy Efficient Hot Water | Model TESY BiLight Electric Hot Water Cylinder 100 Litre | Model TESY Electric Hot Water Cylinder 50 Litre Capacity, Easy to Install and Use |
BrandAriston | Brand TESY | Brand TESY | Brand TESY |
Reviews | Reviews | Reviews  | Reviews - |
Tech Specs | |||
product dimensions 47 x 48 x 60.5 cm 24.6 kg | product dimensions 44 x 44 x 110 cm | product dimensions 44 x 44 x 99 cm | product dimensions 44 x 44 x 60 cm |
included components 12L expansion vessel, combination valve, discharge tundish, instruction manual, warranty certificate | included components Cylinder | included components Cylinder | included components Cylinder |
voltage 240 Volts | voltage 220 Volts | voltage 220 Volts | voltage 220 Volts |
color White | color White | color White | color White |
special features- | special features 15mm Water Connections Pipe connections Not Included , Built in Overheat Protection, and Safety Pressure Release Valve, Meets the Latest European Health And Hygene Standards, Glass Lined - Corrosion Proof, Anti-Freezing Protection | special features 15mm Water Connections Pipe connections Not Included , Built in Overheat Protection, and Safety Pressure Release Valve, Meets the Latest European Health And Hygene Standards, Glass Lined - Corrosion Proof, Anti-Freezing Protection | special features Rustproof, Overheat Protection, Pressure Release Valve, Anti-Freezing Protection |
plug profile- | plug profile Wall | plug profile Wall | plug profile Wall |
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
9.7
1AristonAriston PRO1 ECO 50 L Electric Storage Water Heater with A 50 L, Inclusive Of Unvented Kit, B Class Erp Rating, Waterplus Technology, Manufactured To Be Installed In UK - 3820019. , White
Why we love it
Saves energy
More hot water available
Long lasting
Main highlights- “Eco Evo” Function: The innovative ECO EVO function memorises user habits to deliver hot water while saving up to 14% on energy bills. The product operates in compliance with top standards on energy efficiency within the electric water heating category.
- WaterPlus patented technology: Ariston's groundbreaking WaterPlus technology keeps the incoming cold water at the bottom of the tank, reducing the mix with stored hot water, for up to 16% more hot water availability.
- Water heater designed and manufactured to be installed in UK.
- Total Safety: Pro 1 water heaters have passed all safety tests necessary to meet the standards required by EC directives. The ABS safety package offers protection for both the product and its users. Furthermore, the included Anti Legionella system performs a complete cycle of heating to a temperature of 65° C to sanitize and remove any bacteria present in the accumulated water.
- TitanShield technology for tank protection: The inner surface of the tank is enamelled with a layer of titanium, an anti-corrosion and rust-resistant material, which prevents the surface from corroding, even when in contact with warm water. Titanium’s natural properties are boosted by the action of a large magnesium anode that stops the oxidation reactions on the tank’s inner surface, prolonging the life of the water heater.
- Suitable to any space: Pro1, with a width of only 35,3 cm, has been designed to fit any space. The innovative installation kit allows the replacement of the boiler (of the same dimensions) without having to drill the wall again.
- Ideal Installations: 1-2 Bedroom Properties Small Hospitality & Retail Units Cylinder Replacement Installations.
- Fully UKCA certified to be installed in the UK Market.
-
9.6
2TESY
TESY BiLight 120 Litre Electric Hot Water Cylinder Low Cost Energy Efficient Hot Water
Main highlights- Wall Mounted, Suitable for Homes, Business, Kitchen, Hair Dressers, Camp Site
- Thermal Load Temperature Safety Cut Out
- Safety Temperature Pressure Valve
- Patented Piston Effect to control refilling
- Offers Low Cost, Energy Efficient Hot Water
- Light Indicator to show heating status
- Glass Ceramic Coating, Freeze Protection
-
9.3
3TESY
TESY BiLight Electric Hot Water Cylinder 100 Litre
Why we love it
Low-cost, energy-efficient hot water for daily use.
Patented technology ensures efficient and safe water refilling.
Versatile and suitable for various settings.
Main highlights- Wall Mounted, Suitable for Homes, Business, Kitchen, Hair Dressers, Camp Site
- Thermal Load Temperature Safety Cut Out
- Safety Temperature Pressure Valve
- Patented Piston Effect to control refilling
- Offers Low Cost, Energy Efficient Hot Water
- Light Indicator to show heating status
- Glass Ceramic Coating, Freeze Protection
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.
