

🔥 Elevate your daily comfort with smart, sustainable hot water — because your home deserves the best!
The Ariston PRO1 ECO 100 V UK EU is a 100-litre electric water heater engineered for energy efficiency and durability. Featuring the Eco Evo function, it adapts to user habits to save up to 14% on energy bills. Its patented WaterPlus technology increases hot water availability by 16%, while TitanShield technology protects the tank from corrosion with a titanium enamel layer and magnesium anode. Designed for safety with an ABS package and Anti-Legionella system, it fits compact spaces with a slim 35.3 cm width and includes an installation kit for easy replacement.









| ASIN | B093LTVYN4 |
| Best Sellers Rank | 52,383 in DIY & Tools ( See Top 100 in DIY & Tools ) 84 in Water Heaters & Parts |
| Brand | Ariston |
| Capacity | 100 litres |
| Colour | Black, White |
| Country of Origin | Italy |
| Customer Reviews | 4.7 out of 5 stars 36 Reviews |
| Efficiency | B |
| Included Components | 12L expansion vessel, combination valve, discharge tundish, instruction manual, warranty certificate |
| Is Electric | Yes |
| Item Dimensions W x H | 47W x 96.2H centimetres |
| Item Type Name | Ariston PRO1 ECO 100 L Electric Storage Water Heater, Inclusive Of Unvented Kit, B class ErP Rating, WaterPlus Tecnology, Titanshield Tecnology, Manufactured to be installed in UK - 3820021. |
| Item height | 96.2 centimetres |
| Manufacturer | Ariston |
| Manufacturer Warranty Description | 3 years. |
| Material | Acrylonitrile Butadiene Styrene |
| Model Number | 3820021 |
| Mount Type | Wall |
| Power source | Corded Electric |
| Product dimensions | 47W x 96.2H centimetres |
| Special Features | TitanShield, “Eco Evo” Function |
| Special feature | TitanShield, “Eco Evo” Function |
| Style | Essential |
| Unit Count | 1.0 Count |
| Voltage | 240 Volts (AC) |
Z**N
More than expectations
Unvented solves the pressure through taps
S**N
Perfect for Flats and small houses.
Purchased to replace Ariston ST100 which is no longer available unfortunately. Taller than original heater so had to alter existing pipework and resize connector to undersize of heater. Why Ariston changed the layout and sizes baffles me except if it was to bring in line with European heaters. Fitted heater in 3 hours and now working as expected. Heater elements are always suspect on these heaters as they corrode away.
N**H
Good
Good
J**9
Quality product.
Quality product, looks good, simple but adequate controls, easy to install, works well and great pressure.
G**M
Great product
Great product
A**R
Good unvented cylinder
This is a very good buy, I am very happy, no complain at all
K**Y
Good product what we can see
Larger then we thought it would be, however well made, came on time good delivery.
Trustpilot
1 month ago
1 week ago