Mercor Light&Vent is the Gdańsk company that carries the Mercor group’s smoke ventilation and fire ventilation ranges, manufacturing mcr smoke vents, smoke curtains, smoke-extract fans, dampers and control panels. Its mcr PROLIGHT roof smoke vents are published as certified to PN-EN 12101-2 and CE marked, and the mcr MONSUN T-CS axial smoke-extract fan is published at fire-resistance class F400, meaning four hundred degrees for a hundred and twenty minutes, classified to EN 13501-4 with performance to EN 12101-3 under certificate of constancy of performance 0370-CPR-7525. It holds numerous CNBOP-PIB świadectwa dopuszczenia including 4847/2023 for the mcr 0204 smoke and ventilation control panel, 4940/2023, 5689/2025, 4869/2023, 4679/2022 and 4529/2022, together with ITB-KOT-2020/1330 for gravitational smoke-ventilation devices. Its fire damper catalogue states EN 15650 classifications to EI120 and EI180, tested to EN 1366-2. The group’s passive-protection business trades separately as mcr S.A.