To get total required louvre area i dont think it is Freaa area x 1.5 but x by 2 as the typical free area of a louvre is 50%. You have already calculated the free area so you simply double it.
Hi please do a video on huge air handling units which can produce a 100KW power with 560/630 mm diameter and using microchannel coil and ec plug fans with primary and secondary filters
