The Ariston Andris Elite WiFi is a compact 15-litre undersink unvented electric water heater, engineered for point-of-use hot water in kitchens, bathrooms and utility areas. Built with a titanium-enamelled steel tank and a copper heating element, it delivers reliable performance with an 'A' class ErP energy rating and smart Wi-Fi connectivity via the Ariston Net app.
Designed for both domestic and light commercial settings, including schools, care homes and medical environments, this model combines an intuitive LED interface with automatic anti-legionella protection, an energy-saving Eco Evo function, and a Boost function for fast recovery when hot water is needed quickly.
Undersink
Installation Type
10 Bar
Max Operating Pressure
Important Safety Information
This appliance must be professionally installed in accordance with the Water Supply (Water Fittings) Regulations 1999 (or the Water Byelaws 2000 in Scotland) and current IEE wiring regulations. It requires a dedicated 240V, 3kW mains supply connected via a 20A double-pole switch, and must be earthed.
Titanium-Enamelled Tank
A durable, corrosion-resistant tank lining paired with a copper heating element for long service life and consistent performance.
Wi-Fi & Ariston Net App
Monitor and control your water heater remotely, including temperature settings and scheduling, via the Ariston Net app.
Anti-Legionella Function
Automatically raises stored water to 65°C once a month to eliminate legionella bacteria risk and keep water hygienic.
Eco Evo Energy Saving
Smart electronic control with automatic learning software, helping reduce energy consumption based on usage patterns.
Boost Function
Delivers maximum hot water availability quickly when demand is highest, ideal for busy kitchens and washrooms.
Anti-Overheating Protection
Built-in overheating safety cut-out works alongside the thermostat to protect the appliance and its water supply.
Performance
Nominal Capacity
15 litres
Heating Element Rating
2.5 kW
Energy Efficiency (ηwh)
33.0%
Standing Heat Loss
0.85 kWh/day
Heat-Up Time (10–60°C)
26 minutes (2kW setting) / 20 minutes (2.5kW setting)
Physical & Installation
Installation Orientation
Undersink
Maximum Inlet Pressure
17 bar
Maximum Operating Pressure
10 bar
Electrical & Connectivity
Power Supply
240V AC, 3kW, single phase
Recommended Circuit Protection
20A double-pole switch (BS EN 60669-1)
Cable Requirement
Heat-resisting 3-core, minimum 1.5mm² round cable (to BS 6141 Table 8)
Wi-Fi Frequency Band
2.4 GHz
Maximum Transmitted Signal Power
<20 dBm
Earthing
Appliance must be earthed
Compliance & Standards
Electrical Safety Standards
IEC 60335-1, IEC 60335-2-21
EMC Compliance
EN 55014-1, EN 55014-2, EN 61000-3-2, EN 61000-3-3
ErP Compliance
EU Directives 812/2013 and 814/2013; EN 50440
UK Compliance
UKCA marked; Electromagnetic Compatibility Regulations 2016; Electrical Equipment (Safety) Regulations 2016; Radio Equipment Regulations 2017
Model
Capacity
Element
Orientation
4012004
10L
2.5kW
Undersink
4012006
15L
2.5kW
Undersink
4012008
30L
2.5kW
Oversink
What does 'undersink' mean for this water heater?
Undersink models are designed to be installed below the point of use, such as under a sink or worktop, with water connections oriented accordingly. This differs from oversink models, which mount above the tap. Always confirm orientation compatibility with your installation before purchase.
Does this water heater need a pressure or flow rate boost?
No. As an unvented water heater, the Andris Elite WiFi 15L delivers mains pressure hot water directly, without the need for a pump, as long as your incoming mains pressure is within the appliance's rated 10 bar maximum operating pressure.
Can I install this water heater myself?
No. This appliance must be installed by a qualified professional in accordance with the Water Supply (Water Fittings) Regulations 1999 (or Water Byelaws 2000 in Scotland) and current UK wiring regulations, including a dedicated 240V, 3kW electrical supply.
How does the anti-legionella function work?
Once a month, the unit automatically raises the stored water temperature to 65°C to eliminate the risk of legionella bacteria developing, then returns to the normal set temperature.
What is the Wi-Fi connectivity used for?
The built-in Wi-Fi module connects to the Ariston Net app, allowing you to monitor water temperature, adjust settings and manage energy-saving features remotely from a smartphone.
Is an expansion vessel required for this model?
For the 10L and 15L undersink models, expansion is typically accommodated within the system pipework, provided no stop cocks or isolating valves are fitted within the required expansion distance. If mains pressure exceeds 3.5 bar, or a pressure-reducing valve is fitted, an expansion control kit is required regardless of pipework — confirm with a qualified installer.
