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Guival.C 12kW – Small Electric Combi Boiler for Shower and Central Heating

£1,194.00£1,434.00 INC. VAT

(£995 exclusive of VAT)

A wall-hung electric combi boiler, suitable for smaller properties and flats with a shower. Suitable for one bathroom

Give instantaneous hot water

>8lt/min at 40-50°C

Fully certified under IEC, IMQ, IECEE and Harmonics and Flicker

Compatible with solar panels

Fully insulated

2-year warranty (Subject to TCs and the boiler is serviced every 2 years).

690 (H) x 450 (W) x 315 (D)    (mm)


  1. Guival.C boiler only (no fittings included)
  2. Guival.C boiler + fittings (4 isolation valves)
  3. Guival.C boiler + Warranty Bundle (4 isolation valves + 62A Rotary Isolator Switch + Grasslin Central Heating Filter Pack + Cleaner & Inhibitor + Electrolytic Inhibitor (Cold water) + ZeroCal Water Treatment System)


Bath & Shower

Now, for your peace of mind, we are offering our ELEKTRA WARRANTY BUNDLE. This bundle option includes all the minimal requirements to make sure your electric combi boiler complies with the requirements of the warranty TCs.



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SKU: Guival.C-12kW Categories: , Tags: , ,


Fully UK/EU Tested Certified

  • GUIVAL.C, a small electric combi boiler for showers and central heating, manufactured in Italy.
  • Clean and safe form of heating and hot water solution
  • Continuous hot water for its small size – suitable for a  property with a shower (we only recommend thermostatic shower mixers to experience the best quality shower possible)
  • Suitable for radiators and underfloor heating
  • 240v single phase
  • Uses 50 Amps
  • Use a 10mm cable
  • Flowrate: >8 Lt/min (Click here to check the hot water graph)
  • Completely silent due to Triac-Based Technology.
  • Modulates from 2kW – 12kW
  • Digitally displayed temperatures
  • Simply connect the flow and return from the heating circuit and the cold supply for HW
  • All components, for the normal function of the boiler included inside
  • Hot water limited to 60°C
  • Central heating limited to 75°C
  • Economical (see blue chart below) installer and user-friendly.
  • 2-year warranty (Subject to TCs and registration of warranty.  We recommend a boiler service at least every 2 years).

Package contents:

Option 1: Boiler Only

  • 1 x Guival.C by Guival Electric Combi Boiler
  • 1 x Bracket
  • Manual
(Isolation valves are optional and can be purchased as an add-on on checkout with Options 2 and 3.)

Option 2: Boiler +Isolation Valves

  • 1 x Guival.C by Guival Electric Combi Boiler
  • 1 x Bracket
  • 4x Isolation valves
  • Manual

Option 3: Boiler +Warranty Bundle

  • 1 x Guival.C electric combi boiler
  • 4x Isolation Valves
  • Silicone tube 0.5 Meter
  • 1x Rotary Isolator Switch
  • 1x AQ.322 Non-Bypass Central Heating Filter
  • 1x ZeroCal Water Treatment System
  • Manual



Guival.C by Guival:

Hot water delivery 8 litres/min Constant. 40°C – 60°C (depending on the incoming mains water temperature).

The use of a Guival.C to fill a bath is not recommended, one would have to reduce the flow rate to fill a bath, which could take 15 min+.

Can only supply at one point due to pressure loss if you open two outlets.

Uses a full 12kW or 50 Amps.

Graph (Hot water output):

temperature Graph


The GUIVAL C is available in 12kW.

It is manufactured in Italy and fully certified by UK/EU certification bodies.

We have a team of professional installers trained on how to install, service and repair our boilers to provide support remotely or on-site across the UK.

Available on PRE-ORDER. Deliveries start on October 2023. NEXT-DAY and STANDARD Delivery (3-5 working days) options to choose from.

FREE COLLECTION from our WINDSOR HQ is available upon request.

Electric Combi Boilers Company, Green Acres, Oakley Green Road, Windsor, SL4 4QF


Additional information


No isolation valves, With Isolation Valves, Elektra Warranty Bundle