Reynaers Aluminium develops aluminium window, door and façade systems at Duffel in Antwerp province and is the system house behind most Belgian aluminium fire doors rather than a doorset manufacturer in the ordinary sense. It holds four Belgian ATG approvals in its own name — ATG 2843 and 2985 for the CS 77 FP system at EI 30 and EI 60, and ATG 3152 and 3156 for Forster fuego light at EI₁ 30 and EI₁ 60 — and the CS 77 FP system is the certified basis of eight further CE certificates held by independent fabricators under EN 16034 parts 1, 2 and 3. Its CS 77 FP OW glazed screen carries E 30, EW 30 and EI₂ 30 classes, which is most of what Belgium has by way of certified fire glazing.