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Guival.C 12kW – Small Electric Combi Boiler for central heating & shower

£1,194.00£1,434.00 INC. VAT

(£995 exclusive of VAT)

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

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 . The boiler needs to be 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 + 63A Rotary Isolator Switch + Grasslin Central Heating Filter Pack + Cleaner & Inhibitor + Electrolytic Inhibitor (Coldwater))


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 yet powerful electric combi boiler for small properties with a shower and central heating – manufactured in Italy.
  • Clean and safe solution for heating and hot water.
  • Continuous hot water – suitable for properties with a shower (the use of a good thermostatic shower mixer is recommended to experience the best quality shower possible).
  • Can power up to 14 radiators or up to 100m2 of underfloor heating.
  • 240v single phase.
  • Uses 50 Amps.
  • Use a 10mm cable
  • Flow rate: <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, are included inside.
  • Hot water limited to 60°C.
  • Central heating limited to 75°C
  • Installer and user-friendly.
  • 2-year warranty (Subject to TCs and registration of warranty.  A boiler service every 2 years is recommended).

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
  • 4 x Boiler isolation valve (2 x 22mm & 2 x 15mm)
  • Manual

Option 3: Boiler +Warranty Bundle

  • 1 x Guival.C electric combi boiler
  • 4 x Boiler isolation valve (2 x 22mm & 2 x 15mm)
  • 1 x Silicone tube 20cm
  • 1x Rotary Isolator Switch
  • 1x Grasslin Central Heating Filter Pack + Cleaner & Inhibitor + Electrolytic Inhibitor (Coldwater)
  • 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, to fill a bath the flow rate must be reduced significantly, which means it could take 15 min+ to fill a bath.

Can only supply hot water at one outlet at a time 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.

Delivery Options: NEXT- WORKING DAY and STANDARD Delivery (3-5 working days) and COLLECTION from our WINDSOR HQ are available.

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


Additional information


No isolation valves, With Isolation Valves, Elektra Warranty Bundle