Weather Resistant Louvres
Osbournes Diffusers, Grilles and Louvres
 
WPL 80 Louvres
Weather Resistant Louvres

Free Area % (Width 0.300 - 0.900)
Louvre Size Versus 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 17.5 18.4 18.7 18.9 19.3 19.6 19.7 19.8
0.300 23.3 24.5 24.9 25.2 25.7 26.1 26.3 26.4
0.400 26.9 28.2 28.7 29.0 29.6 30.1 30.2 30.5
0.500 30.8 32.4 32.9 33.3 33.9 34.5 34.7 34.9
0.600 33.5 35.1 35.7 36.2 36.8 37.5 37.7 37.9
0.700 35.0 36.8 37.3 37.8 38.5 39.2 39.4 39.7
0.800 35.0 36.8 37.3 37.8 38.5 39.2 39.4 39.7
0.900 35.0 36.8 37.3 37.8 38.5 39.2 39.4 39.7
1.000 35.1 36.8 37.4 37.9 38.6 39.3 39.5 39.8
1.100 36.1 37.9 38.5 39.0 39.8 40.5 40.7 41.0
1.200 37.0 38.9 39.5 40.0 40.7 41.5 41.6 41.9
1.300 37.7 39.6 40.2 40.7 41.5 42.2 42.4 42.7
1.400 37.5 39.4 40.0 40.5 41.3 42.0 42.2 42.5
1.500 37.3 39.2 39.8 40.3 41.1 41.8 42.0 42.3
1.600 37.2 39.0 39.7 40.2 40.9 41.7 41.8 42.1
1.700 37.7 39.6 40.2 40.7 41.5 42.2 42.4 42.7
1.800 38.2 40.1 40.7 41.3 42.0 42.8 43.0 43.3
1.900 38.6 40.6 41.2 41.7 42.5 43.3 43.5 43.8
2.000 38.5 40.4 41.1 41.6 42.4 43.1 43.3 43.6
2.500 39.1 41.1 41.7 42.2 43.0 43.8 44.0 44.3

Osbournes Ltd, Diffusers, Grilles and Louvres
Osbournes' ventilation solutions control condensation, humidity & mildew

Phone: +64 (9) 622 0650   Mobile: (027) 527 0069 Fax: +64 (9) 622 0651  
Email: Contact Osbournes   Enquiries: General Enquiry Form
Street Address: 112b Mays Rd, Onehunga, Auckland Mailing Address: 112b Mays Rd, Onehunga, Auckland 1061, New Zealand

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