Cooling is required for very diverse industries. For example, data centres, wind power and freeze-drying of food. Our solution is based primarily on the natural cooling principle, i.e. removal and replacement of hot air with fresh air from outdoors, when low temperatures are necessary we can find a solution in combining natural and mechanical cooling. All these solutions are characterised by low service requirements, maintenance, energy cost, as well as long lifetimes. Consequently, the payback on the capital cost is often very impressive.