Aluzon fabricates aluminium window and door systems at Zonhoven in Limburg and holds two Belgian ATG approvals for fire-resisting doorsets, both issued in November 2025 — ATG 3357 for the ALZ FR EI 60, a derivative of the Aluprof MB 78 system, and ATG 3358 for the ALZ FR EI 30. It calls itself a Belgian manufacturer and sells through a network of approved fitters rather than installing itself, which is the ordinary shape of the Belgian door market and the reason its certified work appears in the product register rather than the installer one. It dates from 1992.