Filter fan for ventilation and de-aeration of systems, easy installation, easy replacement of filter mats, protection class IP54, easy change of air flow direction, plain bearing, self-extinguishing plastic UL94 V0, fuse with 6A, free-blowing air flow rate 256/292 m³/h, cut-out [HxW] 223mm x 223mm, dimensions 252mm x 252mm