Osbournes Grilles, Diffusers & Louvres


EXH100 Louvre (Exhaust) Selection

This louvre is designed to offer very high free areas and is most suitable in exhaust applications to provide very low pressure drop. Available in flange and channel frame options.

EXH100 Perfromance
Tested at Auckland Ventilation Services, Sept 2000.
Test results available on request.

Exhaust 100 Louvres - Performance Graph

Example: To select a louvre to exhaust 1.8m3/s with a pressure drop of 20Pa.

Step One:

From the Performance Chart below select the Pressure Drop of 20 Pa. Plot across to the exhaust curve. Then plot down to the indicated free Area Velocity e.g. 4.5 m/s.

Step Two:

Calculate the required Free Area of the louvre.
Free Area = Volume Flow Rate/Free Area Velocity
Free Area = 1.8 (m3/s)/4.5 (m/s) = 0.40 (m2)

Step Three:

Select a suitable louvre from the Free Area (m2) table. Some suitable louvres from the Free Area Table are:

0.750m wide x 1.000m high
0.500m wide x 1.500m high
0.450m wide x 1.700m high
2.250m wide x 0.400m high