Scrog grow neeed help!!!

Ok ive been thinking about how i want to build my box. here it is.

FYI: im hoping to make this a scrog grow 1 or 2 plants at a time..

Will this work????

basically its going to be a plywood box 3.5 ft long 2.5 wide and 4 ft tall.

Im going to use a 250 watt hps put it on a timer and line the walls with mylar.

Im growing in the attick so Im hoping to cut a hole in a AC vent and route a tube and fan to the bottom of my box as a intake, does anyone know if this would work??

and ill have a outake also..

isnt the general rule to be able to recycle the air a couple of times each minute??

Ill have a wireless humididty and temp guage so i can check without crawling backthere..

Ill put a small humidifyer and dehumidifyer in there, is there some kind of
automated guage that will turn them on and off so i dont have to worry about the humidity level

evetually ill put a carbon filter on there also

last but not least ill drill a nice size hole for a drain and ill use poultry wire for the screen... and a small rotating fan on the screen..

Thanks for reading and helping.

the best lessons are gained through experience. that's why us old guys have always got the best shit. Watch your plants closely, and make adjustments as needed.