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55 Litre Boat Water Heater (Twin Coil Calorifier)
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Hotpot Twin Coil Horizontal / Vertical Mount Calorifier (55 Litres)

Part No. 520355

€572.89 You pay €572.89 Incl VAT You pay €477.41 Excl VAT

RRP €636.54 €530.45

Save €63.65 (10.0%) Save €53.04 (10.0%)


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Brand Hotpot
Country of Origin United Kingdom
Construction Copper Calorifier, Stainless Steel Mounting Brackets, Polyurethane Jacket
Calorifier Coil Twin
Capacity 55 Litres of Fresh Water
Voltage Immersion: 240V AC
Wattage 1kW
Height Overall: 350mm (13.8")
Width Overall: 340mm (13.4")
Length Overall: 975mm (38.4")
Calorifier Barbs Domestic: 13mm (1/2"), Coil: 16mm (5/8"), Pressure Relief Valve Barb: 16mm (5/8")
Dimensions The Insulation Measures 1" Thick
Certification / Approvals CE

This Hotpot twin coil calorifier is a simple and efficient means of heating water in your domestic system for use with showers, taps, galley and washing uses. Comparable to a domestic boiler, this calorifier has an inlet for cold water but then uses a link from the engine cooling system to heat the inner coil and therefore the water. It is also supplied with a 240V immersion heater with a built in thermostat. This calorifier can therefore provide you with free hot water while motoring or charging batteries. There is also another coil which can be used with a secondary water heater source.

The boiler is made entirely from copper, designed with performance and health benefits in mind. Copper features excellent anti-bacterial qualities, especially when compared to stainless steel and plastic materials, so gives clean sanitary water throughout your boat. It also heats quickly and the drop coil technology ensures quick transfer of heat from the coil to the water. The outside of the calorifier is insulated in a polyurethane jacket designed to retain heat for up to 24 hours after the engine is switched off. Each calorifier is rigorously tested to ensure the quality and reliability promised.

Water stored in the calorifier reaches the same temperature as the engine, generally about 85°C. The calorifier uses a thermostatic mixing valve to combine this water with cold water to give the required water temperature when hot water is demanded.

The calorifier is easy to connect up and can be installed in a vertical or horizontal position. It is supplied with the thermostatic mixer valve, a 4 bar pressure release valve, a 1kw immersion heater and stainless steel mounting brackets. Other accessories or replacement items are also available.

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  • How do I install the Hotpot Calorifer? +

    Please see attached installation instructions.

    Relevant Documents:
    Hotpot Calorifier Installation InstructionsDownload
  • Will a Copper Calorifier React with my Aluminium Heat Exchanger? +

    No, provided that you use a good quality anti-freeze which contains corrosion inhibitors in your cooling system. Corrosion inhibitors will prevent corrosion of your Aluminium heat exchanger.

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