Weather Resistant Louvres
Osbournes Diffusers, Grilles and Louvres
 
WPL 50 Louvre
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 17.3 18.0 18.2 18.4 18.7 18.9 19.0 19.1
0.300 23.1 24.0 24.3 24.5 24.9 25.2 25.3 25.5
0.400 26.0 27.0 27.3 27.6 28.0 28.4 28.5 28.7
0.500 27.7 28.8 29.2 29.4 29.9 30.3 30.4 30.6
0.600 28.9 30.0 30.4 30.7 31.1 31.6 31.7 31.9
0.700 29.7 30.9 31.2 31.5 32.0 32.5 32.6 32.8
0.800 29.8 30.9 31.3 31.6 32.1 32.5 32.6 32.8
0.900 29.8 31.0 31.3 31.6 32.1 32.6 32.7 32.9
1.000 29.8 31.0 31.4 31.7 32.1 32.6 32.7 32.9
1.100 29.9 31.1 31.5 31.8 32.2 32.7 32.8 33.0
1.200 30.3 31.5 31.9 32.2 32.7 33.1 33.7 33.4
1.300 30.7 31.8 32.2 32.6 33.0 33.5 33.6 33.8
1.400 31.0 32.1 32.5 32.9 33.3 33.8 33.9 34.1
1.500 31.2 32.4 32.8 33.1 33.6 34.1 34.2 34.4
1.600 31.4 32.6 33.0 33.4 33.8 34.3 34.4 34.6
1.700 31.6 32.8 33.2 33.5 34.0 34.5 34.6 34.8
1.800 31.5 32.7 33.1 33.4 33.9 34.4 34.5 34.7
1.900 31.4 32.6 33.0 33.3 33.8 34.3 34.4 34.6
2.000 31.3 32.5 32.9 33.2 33.7 34.2 34.3 34.5
2.500 31.9 33.1 33.5 33.9 34.3 34.8 35.0 35.2

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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