ok i have decided of how i am going to do this

in my 6 ft x 4ft with 8 ft celing

i am going to have 1 x 400w hps and 1x 400 mh

i am going to use mh for vegging
and once i flower i am going to use both hps and mh

for ventilation i am going to have a vortex fan with a carbon filter that sucks air and vents it outside .
i was thinking i am going to have another vortex fan that sucks in air from outside to bring fresh air into the room

i want to build the uiltimate small grow room

any suggestions any body?

anything is helpful

thanks thanks