A weather resistant louvre ideal for commercial and residential ventilation applications. Also used in commercial window and door joinery. The WPL50 Louvre comes in a channel or a flange frame option, with birdmesh fitted to rear as standard.
Tested at Auckland Ventilation Services, Sept 2000.
Test results available on request.
Example: To select a louvre to exhaust 0.595m3/s with a pressure drop of 20Pa.
From the Performance Chart, select the Pressure Drop of 20 Pa. Plot across to the exhaust curve. Then plot down to the indicated free Area Velocity e.g. 4.3 m/s.
Calculate the required Free Area of the louvre.
Free Area = Volume Flow Rate/Free Area Velocity
Free Area = 0.595 (m3/s)/4.3 (m/s) = 0.13 (m2)
Select a suitable louvre from the Free Area (m2) table. Some suitable louvres from the Free Area Table are:
0.500m wide x 0.800m high
0.600m wide x 0.700m high
0.300m wide x 1.400m high
0.450m wide x 0.900m high