GRRDR INTERNATIONAL Installation dimensionsWO331 SURFACE MOUNTED EXTERNAL LOUVRE WO331 Application All dimensions in mm Specifications subject to change © 1-2010 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. Technical information Characteristics • Z-shaped blades under 60° • blades are clipped into a synthetic blade holder • blade height 38 mm • distance of the blades = 33 mm • total cross-section 1.25 mm/1.50 mm • 30 mm surface mounting height • physical passage 43 % • equipped with a welded synthetic insect screen(1.6 x 1.4 maze x 0 0,24 mm), 69% free passage • weatherproof • available with multiples of 1 mm in length and 10 mm in height min L =150 mm, max L = 2000 mm min H = 150 mm, max H = 2000 mm

Montage the louvres are fixed to the wall by screws Construction • frame and blades are made out of extruded aluminium, natural tone anodised • when natural tone anodised, synthetic blade holder is coloured light gray • standard welded synthetic insect screen with 1,6 x 1,4 x 0 0,24 mm maze, 69% free passage • upon request, painted in RAL colour • upon request: - woven stainless steel insect screen (1,4 x 1,4 x 0 0,24 mm) - woven aluminium insect screen (1,8 x 1,4 x 0 0,22 mm) - welded synthetic insect screen (2,8 x 2,8 x 0 0,25 mm) Specifications description Example: Aluminium external louvre...