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FGB_ Fixed Linear Bar Grilles
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Fixed Linear Bar Grilles Wide Blade (FBG WB)
Performance Data

To select an opening size for a given air volume. Project a line from the known airflow through the throw line and intersect opening width line. Pressure drops for various applications can be obtained by projecting a line from the jet velocity line horizontally across.

perf02.jpg (40992 bytes)
Example

Air Flow Rate = 0.278m3/sec/m
Testing with anemometer -
mean velocity 25mm from face = 70% of Velocity.
At points of intersection:-

Throw 
Jet Velocity
Opening Width		 =   6m
=   4.46m/sec
=   137.5mm

Pressure Difference Pa
Blade Angle

0 & 15 deg 45 deg
Supply 12 19
Extract 9 12
Note Add 50% if damper fitted