The Velocity Grid

Dear sir

How should I determiate the probe sets for the velocity test of horizontal laminar air flow cabinets? The HEPA area is 1500mm*760mm.

Hello Golem8079,

for Velocity measurement and verification, try to apply the process as we measure for normal facility hepa filters. Try with anemometer and identify 10 locations (Since the area is big) on the filter face and measure velocity either clock wise or anti-lock wise directions. the locations you can select is 4 at corners and 4 at edges and 2 on the centre of hepa filter… I think this measurement can suffice.

This is one or two Hepa