Ingaphakathi lomnyango womlilo wensimbi uzaliswe yindalo entsha ye-flame-friendly retardant kunye nempahla yokufudumala ukushisa. Ekudibaneni komnyango kunye nesakhelo somnyango kunye nokujikeleza iglasi yomlilo, unyango lokutywinwa komlilo luyenziwa, oluqinisa kakhulu ukusebenza komlilo. Umnyango womlilo wensimbi unokusetwa ngokwemfuno yeWindows, i-louver Windows, i-ventilation louver, njl.