DFM makes steel fire doorsets, fire hatches and fire gates in Gdańsk, built to individual openings. The range holds Krajowa Ocena Techniczna ITB-KOT-2017/0156, fourth edition, issued in July 2025 and valid to July 2030 with a subsequent annex, covering steel internal fire and smoke-tight doors and hatches; an earlier assessment covers its steel internal doorsets. Its published technical documentation for the DFM DS range states classification under EN 16034 and mechanical durability class 3 or 4 to EN 1192 at two hundred thousand cycles, with EI 30 and EI 60 variants.