Answer Posted / ram pratap yadav
To measure the ducting, need to know the depth, width and
length of the duct... says w=1400,h=600,l=9925
,a=(w+h)*2*l/1000000
so (1400+600)*2*9925=39.7sqmtr
the gauge of the duct varies as per the size of the duct
upto 750 - 24g, 750-1500-22g, 1500-2250-20, above 2250-18g
GSS sheet
regards
ram pratap yadav
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