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Marine Calorifiers – Compact, Reliable Hot Water Storage for Boats
A Marine Calorifier is a simple and efficient means of storing hot water, making it readily available, whether that’s in the shower, galley, or washbasin. As a result, it ensures a steady supply of hot water while you’re on board.
Our range of hot water boat tanks is designed to supply a constant supply of hot water from multiple heat sources, all within a small form factor. In addition, they are built to withstand the unique challenges of marine environments.
Durable Construction: We use thicker copper as standard. This means they are better equipped to handle high pressure and are built to last. Every bespoke boat unit has excellent pressure resistance and long-term reliability, ideal for demanding marine environments.
Flexible Orientation: Choose between horizontal or vertical designs to suit your available space and layout.
High-Efficiency Coils: Our finned copper coils deliver fast, efficient heat transfer, optimised for both boiler and engine circuits.
Available in 28 – 40 Litres
Ideal for:
- Yachts and narrowboats
- Offshore support vessels
- Houseboats and liveaboards
- Commercial marine applications
FAQs
A marine calorifier stores hot water in your boat’s domestic system so it’s ready to use at the shower, taps, or galley. It ensures a steady supply of hot water while you’re on board.
Direct Heating: Uses an internal immersion heater powered by the boat’s electrical system or solar PV to heat the water.
Indirect Heating: Uses a coil inside the calorifier to transfer heat from the boat’s engine or external boiler.
Twin Coils: These allow two heat sources (e.g. engine + boiler) to work in tandem, improving efficiency and reliability.
Installing a calorifier unit is relatively straightforward if your boat has a pressurised water system and space near the engine. It can be heated via the engine or shore power immersion heater. Read more here.
Want to understand how marine calorifiers work in more detail? Read our full guide on the ins and outs of marine calorifiers.
Information on our Industrial Calorifiers can be found here.
Specification
| Maximum Working Pressure | 3.0 BAR |
| Test Pressure | 5.0 BAR |
| Max Coil Working Pressure | 3.5 BAR |
| Coil Test Pressure | 7.0 BAR |
| Coil Heating Surface | 0.54m² |
| Material Gauge | 1.5mm |
| Insulation Thickness | 25mm |
Need a custom marine calorifier for your boat? Contact our sales team, and we’ll help you build the right solution.
Example Diagram
