Berkshire + selected London areas

Electric combi boilers for compact properties

Electric combi boilers can be attractive where space is limited and there is no convenient gas supply, but domestic-hot-water performance is governed by electrical input and the product design. We match expectations to the available supply before specifying a unit.

✓ Dimplex certified installer✓ NICEIC registered electrical work✓ G3 unvented qualified✓ Electrical + heating diagnosis

Common reasons customers call

Need heating and hot water in one electric package
No gas supply or no practical flue route
Small flat with limited plant space
Replacing an ageing electric combi
Existing combi gives poor hot-water flow
Need single-phase or three-phase options assessed

What we check before recommending parts

Electric heating faults can be upstream of the appliance. We test in a logical order and keep repair versus replacement as a decision made after evidence, not before.

Hot-water demand and expected flow rate
Electrical supply capacity
Heating heat-loss calculation
Space and service access
System water condition and pressure
Controls and zoning

Where this service is useful

Flats
Apartments
Studios
Small houses
Landlord refurbishments
Commercial studios

Brands and systems

EHC Comet / Fusion AstroStrom electric combiElnur Mattira MAC / MBXHeatrae Sadia Electromax
Important: boiler kW output and cable/protective-device requirements must be based on the actual installation and current manufacturer instructions. We do not size high-load electric boilers from bedroom count alone.

Why flats and London properties are a strong fit

Electric boilers are frequently considered where there is no individual gas connection, a flue route is impractical, the plant space is compact or a landlord wants an all-electric refurbishment. The trade-off is electrical demand, so the incoming supply and hot-water expectations must be checked early.

Berkshire and London coverage

We cover Reading, Maidenhead, Windsor, Slough, Bracknell, Wokingham and surrounding Berkshire areas, plus planned visits in West and Central London including Ealing, Hillingdon, Hammersmith & Fulham, Kensington & Chelsea, Westminster, Richmond and Kingston.

Frequently asked questions

Will an electric combi give the same hot-water flow as a large gas combi?

Not necessarily. Electrical input limits instantaneous hot-water production, so product selection and realistic flow expectations are important.

Is a packaged boiler-and-cylinder unit different from an instantaneous combi?

Yes. Some products combine an electric boiler with stored hot water, which can deliver a different hot-water experience from a purely instantaneous unit.

Can you check whether my supply is large enough?

Yes. We assess the incoming supply and maximum demand before installation.

Are electric combis good for London flats?

They can be a strong option where flues, gas risers or plant space are problematic, provided the electrical capacity and hot-water demand suit the chosen product.

Related services

Technically reviewed by Berkshire Electric Heating

Reviewed 9 September 2026 · NICEIC-registered electrical work · G3 unvented hot-water qualified · Dimplex Pro / Quantum installer training.

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