SMAY manufactures differential pressure systems, smoke dampers, smoke ducts, smoke vents and car-park fire ventilation at Podłęże near Kraków, employing around four hundred people. Its SCD smoke vents are published as classified to PN-EN 12101-2 with reliability Re 1000, snow load classes SL550 to SL1000 and low-temperature classes to minus twenty-five, and its SDS single-zone steel smoke ducts are classified to PN-EN 13501-4 in class E 600 120 single. It holds ITB-KOT-2018/0565 and ITB-KOT-2020/1398 for pressure-differential and multi-zone smoke-duct sets, and the iSWAY NX-FC pressurisation unit is stated to be tested against EN 12101-6 and EN 12101-13. CNBOP-PIB świadectwa include 4690/2022, 5321/2024, 5396/2024 and 5673/2025. On the damper side its KWP-L cut-off damper carries declaration of performance 011-CPR-2017 to EN 15650:2010 under System 1, with CNBOP-PIB as notified body 1438 and certificate 1438-CPR-0509, classified EI 120 to EN 13501-3.