I have my exhaust fan set up as a blower that has a standard 4" duct tube as the exhaust. the intake is all around the outside not really a definate shape(kind of like a pretty squirrel cage blower fan). my issue is that i want to add a carbon filter to the end that is on the other side of my flower room in my veg room. the filter says that it is supposed to go on the inlet of the fan, but i dont have a distinguished inlet. could i put it on the outlet side of my blower where i have the 4" ducting and just blow air through it. i am gonna need it to get the stank out soontho. anyone with any thoughts or previous experience with the matter would be greatly appreciated. thanks yall. - PERM