Ariston Andris R 15L 3kW Undersink Electric Water Heater

Ariston Andris R 15L 3kW undersink water heater

The Ariston Andris R 15L 3kW is a compact unvented electric storage water heater designed for undersink installation and point-of-use domestic hot water.

With a 15-litre storage capacity, 3 kW heating element and approximately 18-minute heating time, the Andris R provides a practical hot-water solution where space is limited and a dedicated local hot-water supply is required.

Ariston specifies the 15L 3kW undersink version with an XXS tapping profile, ErP Class B and a 7.5 kg unit weight.

Ariston Andris R 15L 3kW Key Features

• 15-litre hot-water storage capacity
• 3 kW electric heating element
• Undersink installation
• Unvented electric storage water heater
• Approx. 18-minute heating time
• XXS tapping profile
• ErP Class B
• Compact dimensions
• External mechanical temperature control
• Titanium-enamelled tank
• Copper heating element
• Magnesium anode protection
• 4-bolt flange
• Compact Italian design

An Ariston describes the Andris R range as suitable for domestic and light commercial applications where space is limited.

Technical Specifications

Ariston’s current technical documentation gives the 15L/3kW undersink model a 360 × 360 × 346 mm body size, 7.5 kg weight and 18-minute heating time.

15L Electric Storage Water Heater

The 15-litre tank stores heated domestic water so that hot water is available at the point of use.

Unlike an instantaneous electric water heater, the Andris R is a storage water heater. The water is heated inside the tank and maintained for later use.

This makes the product particularly suitable for locations where a compact stored hot-water supply is preferred.

3 kW Heating Element

The 3 kW heating element provides faster recovery than lower-powered versions of the same range.

For the 15L 3kW undersink model, Ariston specifies an approximately 18-minute heating time under its stated test conditions.

Actual heating and recovery performance can vary depending on incoming water temperature, electrical supply and operating conditions.

Compact Undersink Design

The Andris R 15L is specifically designed for undersink installation.

Its compact square format makes it suitable for installation inside an appropriate cupboard or other suitable enclosed location beneath a sink.

Typical applications can include:

• Kitchen sinks
• Utility rooms
• Bathrooms
• Guest facilities
• Small offices
• Workshops
• Garages
• Annexes
• Point-of-use hot-water installations
• Other areas requiring a compact local hot-water supply

Ariston describes the Andris range as suitable for applications where space is at a premium.

Titanium-Enamelled Tank

The Andris R uses a titanium-enamelled tank designed as part of Ariston’s corrosion-protection approach.

The manufacturer also specifies a magnesium anode and a four-bolt flange as part of the tank construction.

Correct installation and periodic servicing should follow the manufacturer’s requirements.

External Temperature Control

The Andris R uses an external mechanical temperature dial, allowing the user to adjust the water temperature.

Ariston also identifies an E/Economy setting on the control dial designed to help optimise comfort and energy use.

Unvented Electric Water Heater

The Andris R 15L 3kW is an unvented electric storage water heater.

This means the installation needs to comply with the appropriate requirements for unvented hot-water systems, including pressure, safety and discharge arrangements.

Ariston’s technical documentation notes that the maximum cold-water inlet pressure designed for the Andris R unit is 3.5 bar and identifies installation kits including pressure-reduction, expansion-vessel and discharge components where required.

The exact installation arrangement must be determined by a suitably qualified installer in accordance with local regulations.

Ariston Andris R 15L vs 10L

The Andris R range includes both 10-litre and 15-litre undersink models.

The 15L model provides greater stored hot-water capacity than the 10L version, while remaining compact enough for point-of-use installation.

Ariston’s current UK specifications list the 10L 3kW model with a 12-minute heating time and the 15L 3kW model with an 18-minute heating time.

For customers who need more stored hot water at one point of use, the 15L model can be considered instead of the 10L version.

Ariston Andris R 15L 3kW Applications

The compact design makes this water heater suitable for applications such as:

Kitchen Hot Water

An undersink installation can provide dedicated hot water at a kitchen sink without requiring a large central storage cylinder.

Bathroom and Washbasin

The 15L capacity can provide a local hot-water supply for suitable washbasin applications.

Utility Areas

Its compact dimensions make it suitable for utility rooms and other areas where installation space is limited.

Light Commercial Applications

Ariston identifies the Andris R range for domestic and light commercial applications.

Why Choose the Ariston Andris R 15L 3kW?

Compact 15L Storage

The 15-litre tank provides stored hot water while maintaining a compact footprint.

3 kW Heating

The 3 kW element provides an approximately 18-minute heating time under the manufacturer’s specified conditions.

Undersink Installation

The 15L 3kW model is specifically designed for undersink installation.

Titanium-Enamelled Tank

The tank construction incorporates titanium enamel and magnesium-anode protection.

Simple Mechanical Control

The external mechanical temperature dial provides straightforward temperature adjustment.

Established Ariston Design

The Andris R is part of Ariston’s compact electric storage water-heater range, available in multiple capacities and configurations.

Installation Requirements

The Andris R 15L 3kW should be installed by a suitably qualified professional.

Before installation, the installer should verify:

• Available electrical supply
• Voltage and power requirements
• Cold-water pressure
• Hot and cold-water connections
• Unvented-system requirements
• Pressure-reduction requirements
• Expansion arrangements
• Pressure-relief and discharge arrangements
• Suitable mounting surface
• Available cupboard/undersink space
• Local plumbing regulations
• Electrical safety requirements

Ariston’s technical documentation identifies additional installation kits and pressure-control components that may be required depending on the system configuration.

Frequently Asked Questions

What is the Ariston Andris R 15L 3kW?

The Ariston Andris R 15L 3kW is a 15-litre unvented electric storage water heater designed for undersink installation.

Is the Ariston Andris R 15L 3kW an undersink water heater?

Yes. The 15L 3kW configuration is specifically listed by Ariston as an undersink model.

How much water does it store?

The tank has a 15-litre storage capacity.

How powerful is the Ariston Andris R 15L?

This configuration uses a 3 kW electric heating element.

How long does the 15L 3kW Andris R take to heat?

Ariston specifies an approximately 18-minute heating time for the 15L 3kW undersink version.

What is the ErP rating?

The 15L 3kW undersink Andris R is listed as ErP Class B with an XXS tapping profile.

What are the dimensions?

The 15L undersink 3kW version measures approximately 360 mm high × 360 mm wide × 346 mm deep.

Is the Andris R unvented?

Yes. The Andris R 15L 3kW undersink model is an unvented electric storage water heater.

Where can an Ariston Andris R 15L be installed?

Typical applications include kitchens, bathrooms, utility areas, workshops, garages and other suitable point-of-use hot-water locations where an undersink water heater is appropriate.

Does it require professional installation?

Yes. Installation should be carried out by a suitably qualified professional and must comply with the applicable electrical, plumbing and unvented-water-heater regulations.

Buy Ariston Andris R 15L 3kW Undersink Water Heater

The Ariston Andris R 15L 3kW combines compact 15-litre storage, a 3 kW heating element and undersink installation in a practical point-of-use electric water heater.

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