3.2.1. Fibre Filter F

Return air inlet for filtering textile fibres out of the return air of clean rooms, particularly operating theatres and ancillary rooms; for wall or duct mounting.


Standard construction

Volume flow rate range 65 - 1 670 l/s [230 - 6 000 m3/h]
Dimensions W x H 225 mm x 225 mm to
825 mm x 825 mm
Depth 61 mm



  • Fibre retention on inward wire-mesh filter
  • Filter easily removable by hand, without tools, for maintenance and disinfection purposes
  • Mounting in smooth room or duct walls.
  • Standard fibre filter dimensions same as those of customary return air grills
  • Available in many sizes
  • Material: stainless steel, material No. 1.4301
  • Well suited for refitting existing HVAC systems in clean rooms
  • Low sound power Level
  • Optional available with slotted sliding device for air flow adjustment