Answer Posted / md ashwaq

To measure ducting
1) If u do not have width and height of a duct
Use duct manualator or duct sizer software,from which u
will be knowing the width and height by inputting airflow
(CFM) data and headloss.
2) By using the formula...2(width"+height")*length"/144
You will be getting the total duct estimation in square
feet..
3) If the height of the duct exceeds 30 inches ..26 guage
sheets should be used..

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