The Ariston Velis EVO electric water heater has a very modern and flat design of just 27,5 cm deep (10.6"). This electric boiler is very energy-efficient with an energy label B. The Velis EVO has titanium enameled steel tanks. The 50 litre heats up in about 50 minutes to 65 degrees celsius thanks to two smaller tanks instead of one cylinder. The ECO function of this storage water heater makes this unit consume very little energy. 

The Ariston Velis EVO electric boiler has two heating elements. One is 1000 watt and the other is 1500 watt. The maximum rated power is 1500 watt making it also suitable to install in your caravan. ABS 2.0 safety system that protects the unit from power failures. The ECO EVO software combined with the intelligent thermostat control monitor the water usage and timing when hot water is required. A program is autonomously set by the two so it heats up according to your requirements. This helps reduce energy consumption dramatically. 

We can supply one of two pressure relief valves free of charge. Please indicate, which one you prefer by ticking the box at 'Available options' when ordering. The valve with the red lever has a small orifice. You can connect the supplied discharge pipe that orifice to drain of drops of expansion water. The other valve is a WRAS approved pressure relief valve. This WRAS approved valve can only be used together with a WRAS approved check valve and a WRAS approved expansion vessel.

Install the ordered 6 bar pressure relief valve or a 6 bar WRAS or KIWA approved pressure relief valve for the water heater to function properly and to retain your guarantee. 


  • Please note, nominal capacity: 45 litre;
  • Suitable: shower 1-2 persons, shower and washbasin 1-2 persons. Click for calculator;
  • Direct heated;
  • Dimensions (H x W x D): 77,6 x 50,6 x 27,5 cm;
  • Nett weight 21,7 kg;
  • 6 bar pressure relief valve (0.6 MPa) supplied FREE OF CHARGE. Use this valve or the WRAS approved valve below to retain your warrantee;
  • Or supplied with a 6 bar WRAS approved pressure relief valve supplied FREE OF CHARGE. This can only be used in combination with a WRAS approved check valve and WRAS approved expansion vessel; 
  • Pre-installed wall-mounting bracket included;
  • Unassembled UK power plug included;
  • Plugs and screws included for mounting the unit;
  • Suitable for both horizontal and vertical installation; 
  • Digital ECO display;
  • ECO EVO function;
  • Anti-legionella function;
  • 220/230 volt;
  • Heating time to 45 degrees celsius in minutes: 90;
  • Shower ready function: 55;
  • 2 inner tanks made of titanium enameled steel;
  • Two smaller tanks heats up to 60% faster than a traditional single tank electric water heater; 
  • Magnesium anode: protection;
  • Heating elements: firs tank: 1000 watt/ second tank: 1500 watt;
  • Maximum rated power: 1500 watt / 6,5A (2 heating elements, 1000 en 1500Watt);
  • 220/230 volt;
  • Magnesium anode protection;
  • Maximum tank working pressure 7 bar / 0.7 MPa;
  • PUR foam insulated;
  • CE-marked: can be sold in the entire EU;
  • Ideal water pressure: 3 bar;
  • 1/2" connection;
  • Anti-freeze function;
  • 2 year guarantee;
  • Download manual;


I was tempted to go for the Wesen, but in the end I decided to go for the familiar Ariston brand. It has Energy label B, so I can't wait to see what my power consumption will be.


The design appealed to us as it will be in view in our small cottage. Staff at waterheaterstore was very helpful in advising us. It has been running for a month now without fail. Overall very happy

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Water heater Ariston Velis EVO 50

  • Brand: Ariston
  • Product Code: ARISTON50EVO
  • Availability: In Stock
  • £410.80

  • Ex Tax: £339.50

Available Options