i have a 2.4m x 2m tent with 6" exaughst fan/carbon filter...when she all fired up tents sucking in fairly tight...i have 2 x 4" inlet holes open in left n right bottom corners...is this enough open intake ?
Depends on the CFM of the fan, do you have a speed controller for the fan? I use a Variac Autotransformer, but you can get a cheaper one for $20-30USD from a home supply store or Amazon