How to Compute Screen Module % Of Open Area
Step 1: Determine the total area of the screen module
Module Area = Module Width (inches) x Module Length (inches) Example 1 A module that is 12" x 12" has a total surface area of 144 square inches. or, A module that is 12" x 24" has a total surface area of 288 square inches.
Step 2: Determine the individual aperature (opening) area
Individual
Aperture Area =
Aperture Width (inches) x Aperture Length (inches) Example 2 An aperture of 3/4" x 3/4" (0.75" x 0.75") has an area of 0.5625 square inches or, An aperture opening of 1/8" x 1/2" (0.125" x 0.500") has an area of 0.625" square inches
Step 3: Determine the total number of apertures Example 3 A module with 25 rows across the width and 25 rows across the length (25 x 25) has a total of 625 apertures
Step 4: Determine the total area of aperture openings
Total
Aperture Area = Number of Apertures x Individual Aperture Area Example 4 A module with a total 1680 apertures, each with an area of 0.0475 square inches has a total aperture opening area of 79.8 square inches
1680
Apertures x 0.0475
Square Inches per Aperture
79.80
Square Inches Total Area of Openings
Step 5: Determine the Percentage of Open Area
Total Area of Openings % Open Area =
Total Area Of Module Example 5 A 12" x 24" module having a total area of 288 Square Inches and a total opening area of 79.80 Square Inches has a 27.7% Useable Open Area
79.80 Square Inches
÷
288 Square Inches = 27.7% Useable Open Area
