Ariston Pro1 Eco 50L Electric Storage Unvented Water Heater – 3820019

The Ariston Pro1 Eco 50L Electric Storage Unvented Water Heater provides stored hot water for smaller homes, flats, offices and commercial spaces. Its wall-mounted design makes it a practical choice when floor space is limited.

This model has a nominal size of 50 litres and an actual capacity of approximately 49 litres. In addition, its powerful 3kW element heats the stored water quickly. Ariston quotes a heat-up time of around 60 minutes for a 45°C temperature rise.

WaterPlus technology keeps incoming cold water near the bottom of the tank. Therefore, it reduces mixing with the hot water above. Ariston states that this design can provide up to 16% more available hot water under its test conditions.

Meanwhile, the Eco Evo function studies normal hot water use and adjusts the heating pattern. As a result, it can help cut energy use while keeping hot water ready when it is usually needed.

Product Guides and Further Information

• Download the Ariston Pro1 Eco installation manual
• View the Ariston Pro1 Eco product page

Ariston Pro1 Eco 50L Water Heater Features

• Ariston electric storage unvented water heater
• Product code: 3820019
• Nominal size: 50 litres
• Actual capacity: approximately 49 litres
• Power rating: 3kW
• Wall-mounted vertical installation
• Electronic temperature display and controls
• WaterPlus technology for up to 16% more available hot water
• Eco Evo function can help reduce energy use
• T-MAX function for unexpected hot water demand
• Titanshield tank protection
• Magnesium anode helps protect against corrosion
• Anti-legionella function
• Anti-overheating and anti-freezing protection
• Dry-heating safety diagnosis
• Supplied with an unvented installation kit
• ErP energy rating: B
• IPX3 protection rating
• Up to five-year tank warranty
• Up to two-year electrical components warranty

Technical Specification

• Brand: Ariston
• Range: Pro1 Eco
• Model: 3820019
• Heater type: Electric storage unvented water heater
• Nominal capacity: 50 litres
• Actual capacity: Approximately 49 litres
• Mixed hot water capacity at 40°C (V40): 65 litres
• Power rating: 3kW
• Supply voltage: 230–240V
• Maximum operating temperature: 65°C
• Heat-up time: Approximately 60 minutes for a 45°C rise
• Maximum inlet pressure: 12 bar
• Maximum working pressure: 6 bar
• Expansion valve setting: 6 bar
• Expansion vessel pre-charge: 3.5 bar
• Temperature and pressure valve setting: 7 bar
• Standing heat loss: Approximately 0.917kWh per 24 hours
• ErP rating: B
• Load profile: M
• IP rating: IPX3
• Installation: Vertical wall mounting
• Empty weight: Approximately 17kg
• Full weight: Approximately 66kg

Water Heater Dimensions

• Body height: 531mm
• Approximate overall height: 605mm before pipework allowance
• Cylinder diameter: 470mm
• Maximum body width/depth: Approximately 480mm

Before ordering, check the wall space and allow enough room for valves, pipes and future servicing. Furthermore, the wall and fixings must safely support the heater when it contains water.

What Comes with the Water Heater?

• 1 x Ariston Pro1 Eco 50L water heater
• 1 x unvented installation kit
• Expansion vessel
• Required inlet and pressure-control components
• Safety and discharge components
• Installation and user instructions

Ariston may update the kit contents without notice. Therefore, check the latest product literature before ordering. Your installer may also need extra pipes, valves, electrical controls or fittings to suit the property.

Where Can You Use the Ariston Pro1 Eco 50L?

The Ariston Pro1 Eco 50L may suit flats, smaller homes, offices, shops and light commercial settings. For example, it can provide stored hot water where there is no suitable boiler-fed cylinder.

However, the correct size depends on the number of users and outlets. It also depends on whether the heater will supply sinks, basins, showers or baths. Therefore, ask a qualified installer to calculate the expected hot water demand before ordering.

How Does WaterPlus Technology Work?

WaterPlus technology guides incoming cold water towards the bottom of the tank. As a result, it limits mixing between the incoming water and the stored hot water.

Ariston states that this process can provide up to 16% more available hot water under its test conditions. However, the amount available in everyday use will depend on the inlet temperature, thermostat setting and flow rate.

What Does the Eco Evo Function Do?

The Eco Evo function learns common hot water habits and plans heating around them. Therefore, it avoids keeping the whole tank at its maximum temperature when demand is low.

Ariston states that Eco Evo can reduce energy use by up to 14% under its test conditions. However, actual savings will vary with household use, electricity prices and temperature settings.

T-MAX and Built-In Safety Features

The T-MAX function raises the water temperature when extra hot water is needed. Once the cycle ends, the heater returns to its previous setting. Therefore, users can meet occasional higher demand without permanently increasing the set temperature.

In addition, the ABS safety system includes anti-overheating, anti-freezing and dry-heating protection. The anti-legionella function also raises the stored water temperature at set intervals to help control bacteria.

Why Choose the Ariston Pro1 Eco 50L?

• Quick heating: The 3kW element provides a fast recovery time.
• More usable hot water: WaterPlus technology helps reduce mixing inside the tank.
• Simple controls: The electronic display makes temperature adjustment straightforward.
• Energy-saving function: Eco Evo adapts heating to common usage patterns.
• Strong tank protection: Titanshield and a magnesium anode help resist corrosion.
• Compact installation: The vertical wall-mounted design saves floor space.
• Installation kit included: The supplied unvented kit provides the main system controls.

Why Buy from SNH Tradecentre?

• Competitive prices: We aim to offer excellent value across the Ariston range.
• Helpful advice: Our team can help you compare heater sizes and power ratings.
• Genuine Ariston products: Buy from an established plumbing and heating merchant.
• Clear product information: We provide useful specifications to help you order confidently.
• Trade and public welcome: We supply installers, landlords, businesses and homeowners.
• UK-based support: Contact our team if you need help with the product or delivery.
• Independent merchant: SNH Tradecentre is based in Birchington, Kent.

Need Help Choosing?

Not sure whether this 50-litre heater will meet your needs? Call SNH Tradecentre on 01843 842727. Our team can help you compare the Ariston Pro1 Eco range before you order.

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Installation Requirements

A qualified and competent installer must fit and commission this unvented water heater. In addition, a qualified electrician must complete the electrical connection in line with current wiring rules.

The installer must use the supplied unvented kit and provide a safe discharge route. They must also check the incoming pressure, water flow and wall strength before starting work.

Furthermore, the installer must fill the tank completely before switching on the power. Running the element without water may damage it and affect the warranty.

The installation must meet Part G3 of the Building Regulations in England and Wales. Installers must also follow the rules that apply in Scotland and Northern Ireland, together with Ariston’s latest instructions.

Warranty Information

Ariston currently offers up to five years of warranty cover on the tank and up to two years on electrical components. However, registration, installation and servicing conditions apply.

Register the appliance with Ariston within 30 days of installation. In addition, keep the purchase invoice and installation records. Always check Ariston’s current warranty terms for full details and exclusions.

Frequently Asked Questions

What is the actual capacity of the Ariston Pro1 Eco 50L?

Ariston markets this appliance as a 50-litre heater. However, its stated actual water capacity is approximately 49 litres.

How powerful is the heating element?

This model has a 3kW electric heating element. Therefore, it heats faster than many lower-powered storage heaters.

How long does the heater take to warm up?

Ariston states a heat-up time of around 60 minutes for a 45°C temperature rise. However, the actual time will depend on the incoming water temperature and selected setting.

What is WaterPlus technology?

WaterPlus keeps incoming cold water near the bottom of the tank. Therefore, it reduces mixing with stored hot water and can provide up to 16% more available hot water under Ariston’s test conditions.

Does the heater include an unvented kit?

Yes. Product code 3820019 includes the unvented installation kit. However, your installer may need additional pipework and fittings for the property.

Can this heater supply a shower?

It may supply a suitable shower installation with modest demand. However, the installer must check the shower flow rate, number of users and available mixed-water volume before confirming suitability.

Can I install the heater horizontally?

No. This model is designed for vertical wall mounting. The installer must follow the orientation and clearance instructions shown in the current Ariston manual.

Who can install this water heater?

A competent unvented hot water installer must fit and commission it. In addition, a qualified electrician must complete the electrical work.

How much does the heater weigh when full?

The heater weighs approximately 17kg when empty and around 66kg when full. Therefore, the wall and mounting fixings must support this weight safely.

Order the Ariston Pro1 Eco 50L Water Heater

Choose the Ariston Pro1 Eco 50L Electric Storage Unvented Water Heater 3820019 for fast 3kW heating, simple electronic controls and compact wall-mounted hot water storage.

Before ordering, ask your installer to confirm the heater size, electrical supply, incoming water pressure and installation position.

Manufacturers may change specifications, supplied parts and warranty terms. Therefore, check the latest Ariston literature before ordering or installing this product.