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You could well find this article useful even if you sail in sunny areas!

Before you give us  your opinion about on-board heating, let us tell you a little more about it.

On-board heating has a number of virtues: it increases comfort levels, of course, but it also extends sailing areas, can extend the boating season and, above all: a heated boat ages better than others... Benefits worth thinking about...


For some years now, heating system suppliers have been focusing on miniaturizing their equipment and optimizing its performance.

On a boat, it's not just the cold that's the enemy. Ambient humidity and drafts are the factors that have the greatest impact on the feeling of temperature.

At Excess, we don't currently offer heating systems, but recent and numerous contributions on the subject have prompted us to put question to Lab members...


There are two main types of heating system for sailboats:

Forced-air heating, which works like a hairdryer. Heat is transported by the air, which is heated by a boiler that runs on diesel. The air circulates through large-diameter ducting that has to fit into the boat's interior and structure.

Efficient at short range, this solution is comfortable for rapidly reaching a base temperature.

However, air is a poor conductor of energy. This air system is therefore preferable for short distances, as is the case on our cruising catamarans.

Water-based heating is more well-known, as it is comparable to a domestic system you might have at home.

The boiler heats the water, which circulates round the heaters (radiators). Today, such heaters are fitted with fans to increase heat distribution. 

In a water-based system, the pipework takes up very little space on board, making installation easier, but the unit heaters consume cabin space and add weight.

A water-based system is highly efficient over long distances, with the water being able to travel tens of meters with no loss of efficiency. It does have one drawback: the risk of water leakage.

While an air heater will only let air escape without any significant impact, a water leak could cause damage on board.

We'd like to know your preference between these two options. To this end, we've created a questionnaire that we’re inviting you to complete: it won't take you more than 2 minutes.

Give us your opinion!

Thank you in advance for your contribution. It means a lot to us. Together, let's continue to imagine the catamarans of tomorrow!

1 comment
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September 10, 2023

Pour le chauffage, pour les rares fois où c’est nécessaire.
Chauffage d’appoint dans chaque cabine et le carré cela suffit. On les range au fond d’un équipe Rapport utilisation/prix imbattable .