Osbournes Grilles, Diffusers & Louvres
 

WPL100 Louvres   Free Area % (width 1.000 - 2.500)

A heavy duty louvre with a double weather stop. This louvre can be used as a return or exhaust louvre. This louvre has been used extensively throughout New Zealand and is an industry favourite.

Louvre Size v.s. Free Area Percentage

Height Width (1.000 - 2.500)
1.000 1.200 1.250 1.500 1.750 2.000 2.250 2.500
0.200 16.6 16.8 16.8 16.9 17.0 17.1 17.1 17.2
0.300 25.0 25.2 25.3 25.5 25.6 25.7 25.7 25.8
0.400 29.2 29.5 29.5 29.7 29.9 30.0 30.1 30.1
0.500 31.7 32.0 32.1 32.3 32.4 32.6 32.7 32.7
0.600 34.2 34.5 34.6 34.8 35.0 35.1 35.2 35.3
0.700 36.6 37.0 37.0 37.3 37.5 37.6 37.7 37.8
0.800 38.5 38.8 38.9 39.2 39.3 39.5 39.6 39.7
0.900 39.9 40.3 40.3 40.6 40.8 41.0 41.1 41.2
1.000 41.0 41.4 41.5 41.8 42.0 42.1 42.2 42.3
1.100 42.0 42.3 42.4 42.7 42.9 43.1 43.2 43.3
1.200 42.0 42.4 42.5 42.8 43.0 43.1 43.3 43.4
1.300 42.0 42.4 42.5 42.8 43.0 43.1 43.2 43.3
1.400 42.0 42.4 42.4 42.7 43.0 43.1 43.2 43.3
1.500 42.0 42.4 42.4 42.7 42.9 43.1 43.2 43.3
1.600 42.0 42.3 42.4 42.7 42.9 43.1 43.2 43.3
1.700 42.2 42.6 42.7 43.0 43.2 43.4 43.5 43.6
1.800 42.8 43.1 43.2 43.5 43.7 43.9 44.0 44.1
1.900 43.2 43.6 43.7 44.0 44.2 44.3 44.5 44.6
2.000 43.6 44.0 44.1 44.4 44.6 44.8 44.9 45.0
2.500 44.0 44.4 44.65 44.8 45.0 45.2 45.3 45.4