Weather Louvres WL  

   
 
   
TYPE WLL Weather Louvre manufactured of extruded Type 50S anodising grade aluminium. The fixed horizontal blades are held in place by screws. Blades are spaced 35mm apart.
   
Standard Spacing Top blade fits flush with frame. Lip of Bottom Blade overlap frame.
Accessories WM = Wire Mesh
  OBD = Opposed Blade Damper NOTE: Adjustment from face of Louvre is not advisable.
  PC = Punched Counter Sunk Holes
Dimensions ON = Normal Duct size
Notes (1) Alternative Meshes available on request
  (2)
For Weather Louvres smaller than 450 x 300 we recommend the use of Type RA with RASB Blade with19mm spacing.
Type WLL:      Weather Louvre
Vermin Protection:   = Plastic Bird mesh - Standard
    = Galvanised wire mesh
Frame Options 50mm Standard
  30mm  
Finishing Options NA = Natural Anodised
  EPC = Epoxy Powder Coating
     
Ordering Procedure: Example
REF QTY SIZE (LxH) TYPE ACCESS FRAME FINISH SPECIAL INSTRUCTIONS
1 12 1000 x 850 WLL - 50 NA  ON - FS
 
Note
(1)  Dimensions given are for opening size into which grille will fit 
(2)  If code "OS" is entered under SPECIAL INSTRUCTIONS, then dimensions given are over flange