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?

Contact us


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.

Central heating boiler rides the waves of a wood drying plant’s fluctuating heat demands

This producer’s new wood drying room gets what he wants when he wants it: the right amount of steam to tailor the heat to the type of wood he wants to dry.

Tanks at the optimum temperature

43,000,000 litres of vegetable oil in the Ghent canal district were waiting for Callens heat. Now, a new central-heating system keeps the oil storage tanks at the optimum temperature, 24/7.

Medicines guaranteed safe and energy-efficient steam

An up-to-date steam system is crucial for this pharmaceutical company, for it keeps the production of chemical base components for its medicines safe and energy-efficient. The time for an overhaul had come and Callens stepped up to the plate.

Combined heat and power system getting backup from 90 tons of steam an hour

As this grain processor was about to lose its external backup for its combined heat and power system, we called out to install a powerful backup system.

Hospital boiler room renovation

To ensure that this hospital could continue to guarantee its excellent patient care, we revamped the boiler room after years of loyal service.

60 tons of steam for 100 % Belgian potato products

This Belgian potato-product manufacturer now has 60 tons of Belgian steam to prepare its products for end consumers.