The BL075 Series extruded aluminium louvres comprise louvre blades inclined at 45° and mounted at 75mm centres within 99mm, or 143mm deep frames. Galvanised bird screen supplied as standard. Frames can be flanged for surface mounting or knife edge/recessed type to give frameless appearance. . Louvre sizes made to suit customer requirements.
Recommended maximum. size for a single unit: upto 2000 x 2000. Larger sizes accommodated in multi-panel systems.
Nominal free area: 58.6% with bird mesh fitted
Maximum BSRIA weather test rating 2022 (simulated rainfall of 75mm/hr, wind speed of 13m/sec):
BL075-F143F 97.89% (class B) standard birdguard fitted
100% (class A) standard insect mesh fitted
Face Velocity (metres per second) 0.5 1.0 1.5 2.0
Pressure Drop (Pascals) 0.54 6.16 13.86 24.65
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