Osbournes Grilles, Diffusers & Louvres
 

WPL100 Louvres   Free Area % (width 0.300 - 0.900)

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 (0.300 - 0.900)
0.300 0.400 0.450 0.500 0.600 0.750 0.800 0.900
0.200 14.6 15.3 15.6 15.8 16.0 16.3 16.4 16.5
0.300 21.9 23.0 23.4 23.7 24.1 24.6 24.7 24.9
0.400 25.6 26.9 27.3 27.7 28.2 28.7 28.8 29.0
0.500 27.8 29.2 29.7 30.1 30.6 31.2 31.3 31.5
0.600 30.0 31.5 32.0 32.4 33.0 33.6 33.8 34.0
0.700 32.1 33.8 34.3 34.7 35.4 36.0 36.2 36.4
0.800 33.8 35.4 36.0 36.5 37.1 37.8 38.0 38.3
0.900 35.0 36.8 37.3 37.8 38.5 39.2 39.4 39.7
1.000 36.0 37.8 38.4 38.9 39.6 40.3 40.5 40.8
1.100 36.8 38.7 39.3 39.8 40.5 41.2 41.4 41.7
1.200 36.9 38.7 39.3 39.8 40.6 41.3 41.5 41.8
1.300 36.9 38.7 39.3 39.8 40.5 41.3 41.5 41.8
1.400 36.8 38.7 39.3 39.8 40.5 41.3 41.5 41.8
1.500 36.8 38.7 39.3 39.8 40.5 41.3 41.4 41.7
1.600 36.8 38.7 39.3 39.8 40.5 41.2 41.4 41.7
1.700 37.1 38.9 39.5 40.0 40.8 41.5 41.7 42.0
1.800 37.5 39.4 40.0 40.5 41.3 42.0 42.2 42.5
1.900 37.9 39.8 40.4 40.9 41.7 42.4 42.6 42.9
2.000 38.3 40.2 40.8 41.3 42.1 42.8 43.0 43.4
2.500 38.6 40.6 41.2 41.7 42.5 43.3 43.5 43.8