The article codes for the Grada external louver W-331 have changed.

The article codes for the Grada external louver W-331 have changed.

The external louvre, type W-331, is designed for wall application, for supply and exhaust of small air volumes
in heating, ventilating or

The article codes for the Grada external louver W-331 have changed.


  • What was W-331 earlier, now is W-332 (new)
  • What was W-333 earlier, now is W-331
  • W-334 is now obsolete
  • W-330 remains unchanged

You can find the new datasheet on the product page and see the changes yourself in at "how to order"