Exhaust Louvres
Osbournes Diffusers, Grilles and Louvres
 
Exhaust 100
Exhaust Louvres

Free Area % Charts (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 24.9 26.1 26.5 26.9 27.4 27.9 28.0 28.2
0.300 35.8 37.6 38.2 38.7 39.4 40.1 40.3 40.6
0.400 39.1 41.0 41.7 42.2 43.0 43.8 44.0 44.3
0.500 43.0 45.2 45.9 46.4 47.3 48.2 48.4 48.7
0.600 43.8 46.0 46.7 47.3 48.2 49.0 49.3 49.6
0.700 46.1 48.4 49.1 49.8 50.7 51.6 51.8 52.2
0.800 46.2 48.5 49.2 49.8 50.8 51.7 51.9 52.3
0.900 47.8 50.2 51.0 51.6 52.6 53.5 53.8 54.1
1.000 47.6 50.0 50.7 51.4 52.3 53.3 53.5 53.9
1.100 48.9 51.3 52.1 52.8 53.8 54.7 55.0 55.4
1.200 48.5 50.9 51.8 52.4 53.4 54.3 54.6 55.0
1.300 49.6 52.1 52.9 53.6 54.6 55.6 55.8 56.2
1.400 49.2 51.7 52.5 53.1 54.1 55.1 55.3 55.8
1.500 50.1 52.6 53.5 54.1 55.1 56.1 56.4 56.8
1.600 49.7 52.2 53.0 53.7 54.7 55.7 55.9 56.3
1.700 50.5 53.0 53.9 54.5 55.5 56.6 56.8 57.2
1.800 50.1 52.6 53.4 54.1 55.1 56.1 56.4 56.8
1.900 50.8 53.3 54.2 54.9 55.9 56.9 57.1 57.6
2.000 50.4 52.9 53.8 54.4 55.5 56.5 56.7 57.1
2.500 51.4 53.9 54.8 55.5 56.5 57.5 57.8 58.2

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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