During the chemical hardening process of concrete, heat is released. In scientific terms, this is referred to as an exothermic or exoenergetic process. The amount of heat that is released in a closed environment is not easy to utilise; and to create a working environment in the production halls that is more pleasant in the morning and comfortable to work in would require the removal of too much heat. This is certainly the case during the warmer periods of the year.

“We had done it already in Lemmer, and now also at our site in Lelystad”

The heat can be removed in various ways. The best and cheapest method is by natural ventilation. With natural ventilation all you have to do is use the thermal pressure and draught height already present in the building, without having to add any mechanical energy. Openings in the walls and roof that are of sufficient size and allow an adequate flow of air ensure that the released heat can be removed easily without the use of energy. Climate control is now also used, as it certainly makes a difference whether the incoming air has a temperature of, for example, -10 degrees or +20 degrees.