Lots OF QUESTIONS... 3 600's exhaust etc

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SO here we go.

I have a 7'6" wall and a 6'6" wall that are against a corner (cement) of a garage. I have the walls framed and up. I am in the stages of getting the door on and hinges mounted. So heres the tricky part. I want to fit 3 600w HPS lamps in there...the room is

7'6" Long by 6'6" Wide

I dont have any experience rigging fans and exhausting....lol my last two grows were pretty ghetto but it was the learning that i needed. NOW i have funds available and want to do it right. CAN SOMEONE PLZ HELP me troubleshoot setting up my exhaust in and out with 3 600 ( IDEALLY) I guess i can settle to do 2 .

THANKS in advance!

squirrel cage fan at one end blowing through the fixtures to an exhaust seems pretty simple.You would just connect the ducting between the fans.Set ups like that are easy and efficient,one fan,low noise.

If you have vented hoods an inline fan through ducting would be the ticket. The end run must be through the wall and outside your room. you can also mount a fan in the wall and exaust the whole room. I have both. I have found it is better to have a fan pulling air rather than pushing.

So I drill an 8" hole to accomodate my 8" SP fan BLOW air IN the room THROUGH the lights hook up my other 440cfm inline fan AFTER OR IN THE MIDDLE OF the 2nd /3rd light and where does my carbon filter go? At the end of the lights......another dillemma running c02 dont wana vent out my c02 every time i gotta fix temps.....im using a sentinel CHHC-1...sick shit input?

here we go just a little confused about if i need another fan....OR EVEN IF i need to vent in and out....If i spent the money on fans towrds an AC it would equal out i think.....just lookin for input!!!!!!!!