Top-Quality Water Heaters/Calorifiers for Boats, Vans, and Off-Grid Builds
Explore Water Heaters at Heatso
Heatso offers a wide range of boiler water heaters/calorifiers for RVs, vans, boats, welfare units, mobile workshops and more. These water heaters look like boilers and are designed to provide hot water.
They work primarily by utilizing heat from an engine or coolant heater, like Eberspacher Hydronic or Webasto Termo Top Evo. In addition, these boiler water heaters have a 110V or 230V electric immersion heater.
Trusted Performance On the Road and at Sea
We are proud to offer the SureCal line by
Surejust marine water heaters that are built with premium materials, ensuring top performance for your boat or van. Surecal
innovative drop coil technology and finned heat exchanger deliver superior heat recovery. Plus, we also offer
twin-coil boiler models for seamless integration with secondary water heaters.
Every SureCal unit arrives
fully assembled and ready for quick and easy installation. Standard features include an immersion heater, pressure relief valve,
barbed engine coil connections, and durable stainless steel mounting brackets.
For onboard safety and increased hot water volume, a
thermostatic mixer valve comes pre-installed in the water heater. Each SureCal water heater is
individually bench-tested to guarantee consistent quality and reliability.
Why Choose Our Marine Boiler Water Heaters?
Surejust boiler water heaters are often the
No. 1 choice for boat builders due the perfect quality and price ratio.
Whether you need a
boiler water heater for a yacht, sailboat, motorboat, fishing boat, cruiser, or any other recreational or commercial vessel - Heatso has you covered. These heaters can also have an
immersion heater that is useful when you have shore power available.
How to Choose the Right Calorifier
The key to buying the right hot water calorifier or van water tank is choosing the right size. Larger RVs, boats, or food trucks need higher-capacity units, while small vans or weekend campers can get by with smaller models.
Also, plan how you'll heat your hot water, whether by electricity, engine heat or a coolant heater.
Still Have Questions?
Our team of van life experts is here to help you choose the best camper van water tank or hot water calorifier for your vehicle.
FAQs
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Which size camper van water tank should I choose?
Our best selling models for van conversion are the
2.64 gallon and
3.96 gallon models. However, you can choose the size of the boiler water heater depending on your needs and the space available in your build.
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Are these systems compatible with boats and yachts?
Yes. Many of our calorifiers, especially SureCal models, are suitable for boats.
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How is the water heated in a calorifier?
Calorifiers use either engine coolant heat, electric elements, or are heated by a coolant heater depending on the model.
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Can I install these products myself?
Many systems are DIY-friendly, but professional installation is recommended for complex builds.
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Do you offer support after purchase?
Yes! Our team is available to help with setup, maintenance, and any technical questions
