Calorifier Tanks and Boat Water Heaters

Calorifier tanks (marine water heaters) provide reliable hot water for taps and showers on board. These heaters are made for boats.

They warm stored water in two ways. One way is indirectly, using waste heat from engines or a vehicle air/water heater. The other way they heat water is directly by using an integrated electric immersion element.

Marine calorifiers are not fired boilers. They use efficient heat transfer and thick polyurethane insulation. This insulation helps keep the temperature for up to 24 hours. That means fewer engine runs, lower energy waste, and ready hot water when you need it.

Choose from compact 15 L units to larger 40 L models to suit crew size, galley use, and shower frequency. Each model offers secure marine fittings, corrosion‑resistant tanks, and straightforward installation for pressurised or unpressurised systems.

Browse our range to find the ideal water heater for your boat and enjoy dependable hot water wherever you cruise.