Page 127 - PMAA Brochure_FINAL

AIR FLOW CALCULATOR

AIR FLOW CALCULATOR

EXAMPLE 1: PMA 4220
Minimum Distance Across Louvre (A = 29mm)
Divided by Pitch (B = 55mm)
 Multiplied by 100
Divided by 1
( 29  55 ) x 100 1 = 52.73%
(53%) Air Flow - Approximate.

= 29mm
Across Louvre
(A) Minimum Distance
(B) 55mm Pitch  SCALE 1:1

External

 (A) Minimum Distance

= 57mm
Across Louvre

(B) 100mm Pitch  EXAMPLE 2: PMA 3114

Minimum Distance Across Louvre (A) = 57mm
Divided by Pitch (B) = 100mm
Multiplied by 100
External Divided by 1
( 57  100 ) x 100 1
= 57% Air Flow - Approximate.

*NOTE: DRAWINGS ARE NOT TO SCALE 2021 CATALOGUE 127