SagiCofim manufactures air filtration, diffusion and distribution components at Cernusco sul Naviglio, including a fire-protection range of rectangular, circular and cartridge dampers for ventilation compartmentation. The HTE450C circular damper is certified to EN 15650, tested to EN 1366-2 and classified to EN 13501-3, achieving EI 120 S with leakage tightness to EN 1751; the range extends to an ATEX-rated EI 120 S variant and an EI 60 S cartridge damper. Construction is a galvanised steel frame with a calcium-silicate blade and an expanding intumescent gasket. The company was formed in 1999 from the merger of Sagi Italiana and Cofim, the latter trading since 1964. The notified body is not named on its public product pages.