Filter fan for system ventilation; easy installation; filter pads can be easily changed; degree of protection IP54; airflow direction can be easily changed; plain bearing; UL94 V-0 self-extinguishing plastic; fuse with 6 A; air delivery rate, free-blowing 25/29 m³/h; cutout [HxW] 92mm x 92mm; dimensions 109mm x 109mm