Mercury 12kW Combi Boiler

    £1,680.50 £1,394.82 inc. VAT

    Free UK Delivery on orders

    The Mercury Electric Combi Boiler is the Premium Electric Boiler solution for Heating & Hot Water with the added benefit of Weather Compensation & Advanced Service Diagnostics.

    This Electric Combi Boiler provides a very cost effective alternative to electric storage heating, oil, solid fuel or LPG systems. It is the perfect solution to properties with no access to mains gas supply and homes which have gas boiler restrictions e.g. listed buildings and bed-sit sleeping areas. Not only is the Electric Boiler the ideal choice for wet central heating but is also suited to Underfloor Heating.

    The Mercury Boiler outputs are 12kW & 14.4kW Single Phase, and 19kW & 26kW Three Phase. The operating temperatures of the boiler can be adjusted using the easy to use Digital Control Panel with adjustable temperature outputs ranging from 30°C-60°C (Hot Water) and 20°C-85°C (Central Heating).


    Mercury Electric Combi Boilers are suitable for properties that have a Shower and Hot Water outlets for sinks.

    It is not recommended that they are used for properties with Baths as generally the flow rate is insufficient to fill a Bath in a suitable timescale. In the event that there is a Bath in the property the Mercury can be used to Heat the Radiators and a Hot Water Cylinder via an ’S’ Plan configuration for Domestic Hot Water purposes.

    If 3Phase Electricity is available our 19kW & 26kW Mercury Boilers would have sufficient flow rates to fill a Bath in a suitable timescale.

    We also offer a comprehensive range of Electric Boiler and Cylinder packages designed to be affordable and bespoke to your requirements

    Order before 12 pm
    for FREE Next Day UK Delivery
    These items are available with free next working day delivery. You can choose your delivery date from our calendar at the checkout. Next working day delivery dates are available when you order before 12pm (excluding weekends).
    Please be aware you will need someone on hand to sign for the delivery and move the item into your property.
    All goods should be inspected on delivery, and any damages must be reported within 24 Hours
    If you are ordering multiple different items, we will always endeavour to dispatch your goods together. However, separate dispatches may be necessary if the items you have ordered are being shipped from different locations. Check our delivery page or speak to our customer service team for more information.


    Boiler Specification

    ErP Rating
    D(Heating) A(Hot Water)
    Boiler Warranty
    5 years

    Mercury Features

    • 100% efficient
    • Instant Domestic Hot Water
    • Enhanced Hot Water Flow Rate Due To Bare Wire Technology
    • Low Running Noise (32Db)
    • Suitable for Underfloor Heating
    • Rapid Heat Up Times
    • 5 years Guarantee *T&C’s Apply
    • External Weather Compensation
    • Automatic Power Modulation
    • Integral System Diagnostics
    • Easy-Fit Connectors & Sensors
    • High Current Thermal Cut-Out
    • Pressure Gauge
    • ErP Smart Pump

    The Mercury boiler brings a new era to the Electric Combi Boiler market with the introduction of External Weather Compensation & Bare-Wire Heating Element technology for Domestic Hot Water.

    Bare-Wire elements are more robust in tackling the formation of lime scale due to operating at higher temperatures with a lower surface area.

    The Mercury also features advanced service diagnostics via the main interface.


    EHC - The Electric Boiler Specialists

    • Installation is quicker than a gas system
    • The wiring of an Electric Boiler is the same as an Electric Shower
    • Electric Boilers can be used for Open Vented Systems
    • Can be used as back-up for Heat Pumps
    • Standard radiators and valves can be used with Electric Boilers
    • EHC Electric Boilers have a soft start to avoid power surges
    • Electric Boilers are almost silent when operating
    • Electric Boilers emit no noxious fumes or gases
    • Can be used with underfloor heating systems
    • EHC only use and recommend High Efficiency ErP Smart Pumps
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    Company Number: SC289495

    VAT Number: GB870630137

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    01698 820533

    Block 5, Unit 40, Third Road, Blantyre Industrial Estate, Blantyre, South Lanarkshire G72 0UP
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