Beginging a Stealth hydro grow

Basically i have a 4x4x7 space sealed with plywood and poly, im going to buying a 6 inch 435 cfm inline fan ( http://www.plantlightinghydroponics.com/valueline-inch-435-cfm-centrifugal-inline-fan-p-2260.html ) running into a home made carbon filter ( https://www.rollitup.org/indoor-growing/7074-easy-build-diy-carbon-filter.html ) with a 80 cfm intake, im running a space heater attempting to regulate the humidity and temp is becoming a problem due to cold intake air, im running the stealth hydro system with the 65 dual spectrum lights, and will be adding a led ufo for the flowering phase. basically im going to be posting question and hoping to recieve some help or guidance, one major concern as of now will be to much air flow with a 473 cfm inline fan so i was hoping to start with asking anyone if they can post a link or explain how to wire a inline fan speed controll. along with any suggestions how to air tight the door to my room, which is only a door roughly 2 and a half feet high, and 1 and a half feet wide. I may eventually add pictures once everything is finalized

what up mayn yeah we're at the same crossroad headed the same direction... i'm sick of paying for somebody elses whatever weed when i can grow my own beauties for the cost of on Oz. and the only place people are not allowed in my house is upstairs so i'm going to use the same size closet. I am going to order the same bubbleponic setup when i get home and am very excited about gettin some grade A . I'm concerned, however, about the grow space... even with training them to grow a certain way what about them pushing up against the wall do you think it could be too stessfull for them once all 6 plants are full grown?

acually im suprised by how much space i have, more then expected. i only plan to have 4 plants max in my plants cause i imagine they will get quite heavy. and high shouldn't be a issue im my opinion, just remember when they flower they grow a fair bit more, or a sea of green method is advisable, i will acually be removing my cfl from the grow after this one as i will have more then one led light