Walterwhiter
Well-Known Member
So I have ×2 250cfm 150 Cfm airflow I believe it said. One pushes one pull on either end. I'm getting an air cooled hood and filter. It a negative pressure set up. Pull through the filter-hood-fan#1-about 20' of ducting-and out of the building. So now for the question how do I figure out what cfm my filter needs to be. Do I just go off the max cfm of one fan #1. Or do I factor in both and adjust for some loss through the almost 20' haul.
Thanks
Thanks