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Surface mounted external louvre


Surface mounted external louvre

The external louvre, type WO331, is designed for surface mounted wall application, for supply and exhaust of small air volumes in heating, ventilating or airconditioning installations. The design and the mounting of the Z–shaped blades ensure a weatherproof louvre. At the back, a welded synthetic Insect screen with 1.6 x 1.4 maze is standard provided.


  • External louvre with Z-shaped blades under 60°.
  • Distance of the blades = 33 mm.
  • The louvres are fixed to the wall by screws.


  • Outdoor


  • 1 way throw

    1 way throw

  • Exhaust


  • Rectangular execution

    Rectangular execution

  • Specifications