iKON offers 3 generic ranges of Louvre systems based upon alternate blade pitches of 33,35 & 50mm and with a variety of outer frame options that include an equal leg system for glazed-in applications. All Louvre products have been independently tested & classified through BSRIA. The key features of these product groups are detailed below: L331/332 Glazed-in (L332) or Flanged (L331) Versions 20,24 or 28mm equal leg glazed-in options as standard 33.5mm Blade Pitch Maximum Free Area of 55% Incorporates fly-screen/insect mesh Independently weather tested through BSRIA providing category B watertightness L351/352 Glazed-in (L352) or Flanged (L351) Versions 24mm or 28mm equal leg glazed-in version as standard 35mm Blade Pitch Maximum Free Area 48% Incorporates perforated backing plate as part of the blade assembly Cost effective blanking solution Easily self assembled Independently weather tested through BSRIA providing category A watertightness Vandal Resistant L501/502 Glazed-in (L502) or Flanged (L501) Versions 24mm equal leg glazed-in version as standard 50mm Blade Pitch Maximum Free Area 50% Incorporates fly-screen/insect mesh Independently weather tested through BSRIA providing category C watertightness