Ceulemans is one of the largest producers of hydro lettuce in Belgium. The total surface is around 12 ha, where Ceulemans cultivates different leafy green variaties. Ammerlaan Construction has built a 3.5 ha ZON-greenhouse for Ceulemans. A ZON-greenhouse is a unique concept by Ammerlaan Construction. The main difference with a standard Venlo greenhouse is the higer light transmission, which reduces energy consumption and allows you to take full advantage of sunlight.