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Thermo-fireplaces

Turn your fireplace into a real heating system: the closed water-jacket fireplace heats the room, the radiators and the hot water, with a far higher efficiency than an open fireplace. CTM models in stock.
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What is a water-jacket fireplace?

The water-jacket fireplace is a closed-hearth fireplace connected to the home's water system. Unlike a traditional fireplace, it does not just heat the room where it sits: it heats the water that feeds the radiators and, in the hydro versions, the domestic hot water too. It is the solution that combines the charm of a visible flame with central heating for the whole home.

Water-jacket fireplace versus open fireplace: efficiency

The main difference lies in efficiency. An open fireplace loses much of its heat through the flue and rarely exceeds 20% efficiency. The closed water-jacket fireplace, thanks to a combustion chamber sealed by ceramic glass and a water heat exchanger, recovers far more heat and reaches high efficiency, generally above 70%. This means more useful heat for the same amount of wood or pellets loaded.

How the connection to the system works

Inside the water-jacket fireplace, a coil or heat exchanger transfers the combustion heat to the water in the system. The heated water is then distributed to the radiators and, where provided, to a tank for domestic hot water. The water-jacket fireplace integrates with your existing heating system and can work alongside a condensing boiler as a complementary heat source.

Output in kW and sizing

The output of a water-jacket fireplace is measured in kW and is split between the heat released to the room and the heat released to the water. The models in the catalogue cover outputs suited to heating both the living area and a significant number of radiators. As a rough guide, a well-insulated home needs around 1 kW for every 10 m² to be heated, bearing in mind that part of the output is dedicated to the water system.

Wood or pellets: which water-jacket fireplace to choose

Wood water-jacket fireplaces offer a live flame and low fuel cost, with manual loading of the hearth. Pellet ones add autonomy and automatic scheduling. If you are after the sheer convenience of automatic management connected to the radiators, consider the pellet boiler stoves instead, while for heating a single room you can look at the wood stoves and the pellet stoves.

Brands, prices and installation

In this category you will find the CTM water-jacket fireplaces, with prices ranging from around 2290 to 2910 euros and available in stock. Installation requires a flue that meets the standards and the hydraulic connection to the system, to be entrusted to a qualified technician. Correct fitting ensures the safety, efficiency and long-term durability of the heat exchanger.

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Frequently asked questions

What is the difference between a water-jacket fireplace and a traditional fireplace?
A traditional open fireplace heats only the room where it sits and loses much of its heat. A water-jacket fireplace is a closed hearth connected to the system: it heats the air, the radiators and the domestic hot water with a far higher efficiency, generally above 70%.
Can a water-jacket fireplace heat the whole house?
Yes. Being connected to the radiators and the water system, the water-jacket fireplace distributes heat to all the rooms served by the radiators and, in the hydro versions, also produces domestic hot water for the bathroom and kitchen.
How many kW do I need for my water-jacket fireplace?
The output is measured in kW and is sized on the square metres to be heated, bearing in mind that part is released to the room and part to the water. As a rough guide, a well-insulated home needs around 1 kW for every 10 m² of surface.
Does a water-jacket fireplace also produce domestic hot water?
The hydro versions with a tank or dedicated storage produce domestic hot water as well as heating the radiators. The basic versions mainly heat the heating system, so it is worth checking the configuration of the chosen model.
Do I need a flue for a water-jacket fireplace?
Yes, the water-jacket fireplace is a combustion appliance and requires a flue that meets the standards for venting smoke. The hydraulic connection to the system is also needed, to be entrusted to a qualified installer.
Is a water-jacket fireplace or a pellet boiler stove better?
The water-jacket fireplace offers a visible flame and suits anyone who wants a striking hearth connected to the system. The pellet boiler stove favours autonomy and automatic scheduling. Both heat the radiators, so the choice depends on looks and management.
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