Interested in our thermal solutions? Keen to find out more about one of our services or looking for a quotation? In search of a rental boiler?

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Interested in one of our thermal solutions? Like to know more about our services? Find inspiration in some of our projects here! And, in the event of questions, we will be happy to provide you with further details about a specific application.

Solution to a special heat demand

This system at a leading producer of oleochemicals consists of a gas-fuelled thermal oil system with peripherals in a brand-new boiler room.

More sustainable source of energy for heat grid

This system recovers the heat generated by the incineration of domestic waste and transfers it to the heat grid via a thermal oil and central heating circuit. Henceforth, consumers connected to the heat grid are assured a more sustainable source of energy.

Continuous steam supply 24/24


As this company needs steam day and night a continuous supply is essential. To ensure just that the company has a back-up steam boiler that takes over in the event of problems or when the main steam boilers are being serviced.

Callens has broken another record

Our very first 60T/h fire-tube steam boiler is up and running! A maverick from every perspective! As this project involved replacing an existing condensing boiler, a few ingenious changes to the construction were in order to allow the boiler to operate on a minimum of power.

Wanted: the most compact steam boiler system

The size of the boiler room in this particular project meant that nothing other than the most compact steam boiler system would do.

Excellent ventilation for excellent fries

Water and steam: they are the most crucial ingredients for the industrial processing of potatoes. However, they are often the cause of mold and bacteria as well. Our extensive research brought us to the final solution: a system that uses outdoor air to ventilate the production area.