Water heaters and accessories

Marine Boiler: Choosing the Right Model

A marine boiler is essential for having hot water on board, whether it's for a refreshing shower after a swim or washing dishes. Our nautical water heaters are designed to withstand the harsh marine environment, featuring tanks made of AISI 316 stainless steel and high-efficiency thermal insulation.

We offer models from 6 to 75 liters to suit various space and consumption needs. Isotemp SPA boilers, for example, are compact and easy to install, while Ati di Mariani models guarantee long-term reliability. Always check the dimensions (length, diameter, bracket spacing) to ensure the boiler fits the available space on board.

Remember that a well-sized boiler will save you energy and extend the life of the tank. Verify the maximum pressure supported by your boat's plumbing system before choosing a model.

Advice from Nautica Basile

• Installation: Entrust the installation to a qualified technician to ensure safety and proper operation.


• Maintenance: Regularly maintain the boiler, checking connections and cleaning the tank to prevent limescale buildup.


• Accessories: Pair the boiler with a thermostatic mixing valve to regulate water temperature and prevent scalding.

Complete your water system with our bilge pumps and water tanks for an efficient and reliable setup.

Frequently Asked Questions

What size boat water heater do I need for my boat?

The boiler capacity depends on the number of people on board and your usage habits. For a couple, a 20-30 liter boiler may be sufficient for showers and sinks. For a family, it's better to opt for a 40-liter model or larger. Also, consider the presence of a galley on board.

How is a marine boiler installed?

Installing a marine boiler requires specific skills. It is necessary to connect the boiler to the plumbing system, the electrical supply (or the engine cooling circuit), and provide a drain for the safety valve. We recommend relying on a qualified technician.

What are the advantages of an AISI 316 stainless steel boiler?

AISI 316 stainless steel is resistant to marine corrosion, ensuring a long boiler life even in saline environments. It is a hygienic and easy-to-clean material, ideal for drinking water. In addition, stainless steel keeps the water temperature longer than other materials.

Can I use the hot water from the boiler for heating?

Some marine boilers are equipped with a heat exchanger that allows you to use the hot water to power a heating system on board. Check the model specifications to make sure it is compatible with this function.

What size boat water heater do I need for my boat?

The boiler capacity depends on the number of people on board and your usage habits. For a couple, a 20-30 liter boiler may be sufficient for showers and sinks. For a family, it's better to opt for a 40-liter model or larger. Also, consider the presence of a galley on board.

How is a marine boiler installed?

Installing a marine boiler requires specific skills. It is necessary to connect the boiler to the plumbing system, the electrical supply (or the engine cooling circuit), and provide a drain for the safety valve. We recommend relying on a qualified technician.

What are the advantages of an AISI 316 stainless steel boiler?

AISI 316 stainless steel is resistant to marine corrosion, ensuring a long boiler life even in saline environments. It is a hygienic and easy-to-clean material, ideal for drinking water. In addition, stainless steel keeps the water temperature longer than other materials.