Mark Climate Technology has been specialising in climate management for large buildings since 1945. Under the name ‘Ingenieurs­bureau Gebroeders Van der Mark NV’, production and sales of bending machines and coal-fired air heaters were started. From the mid-1950s, the ‘van der Mark’ brothers increasingly focused on heating large buildings. For this purpose they built hanging gas-fired air heaters themselves. This is how the GS series came about, a unique system that is still a leader in the European heating market to this day. This innovative strength still characterizes Mark. Mark Climate Technology now supplies a leading range in the field of heating, cooling and ventilation. This means that our customers can go to one supplier for their complete climate management system.