Tulderhof Ventilation produces air inlets, daylight products and pop-hole doors for poultry and pig housing. Tulderhof want to be up front in this market. We can come up to that mark by translating many years of experience and knowledge into innovative solutions for the agribusiness. We produce durable, high quality products tailor made for our customers. Tulderhof was founded in 1987 by Mr. Jan de Graaf, who owned three broiler houses at that time. Mr. de Graaf developed his own air inlets and was the inventor of the principle of steering air inlets with under pressure. A system today used world wide. Mr. Gjalt van Hes graduated in 1999 as a veterinarian and became a co-owner of Tulderhof Agrosystems bvba in 2005. In 2012 he became the owner of Tulderhof