cooling a 400 watts hps air cooled hood

i need help cooling my 400 watts hps air cooled hood in my 5x2 closet,the air cooled hood is a 6" Air Cool hood 23" x 17" with Glass Cover,can you tell me how to set up the proper air ventilation? i dont mind the smell of the plants so a i dont need a carbon filter, i know i need a ducting and a in-line fan but how do i set it up to keep the closet cool?

Fan --} light --} ducting


Attach fan to cool tube blowing through, then attach ducting at other end to where you desire the hot air to blow out

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dont look at number 2 its not really necessary to have an intake fan and you will have passive intake from exhausting