Venting the hood for me doesnt really do much... if I didnt it would be dangerous though.

I have about the same space maybe double, what I would do is get a fan like I installed ill try to dig up a picture.

Ok I cant but one is in my log. I tell about how I cool the same sized space.
Long story short buy a 1050 - 1600 CFM attic fan, some screws, 15 inch ducting and some duct tape, and a router dimmer , maybe 90$ for all of it and you can cool down a stadium. Also can put it on really low, almost silent and move what seems to me like 300 + cfm .

This gives me absolute control over heat / humitidy. Higher it is on the lower my temps and usually higher humidity since outside air is over 50 in the valley of oregon.
OregonsDank Reviewed by OregonsDank on . Too much heat! hey anyone who can/will help!!! Ive got 15 clones under a 1000 WATT HPS. a fan connected to a cool tube, exits the room and hooks up to a carbon filter outside the room. the intake fan is on the floor and can move 90 cfm. the room is 90 cubic feet. overall the heat is about 89 degrees ferenheit. please heeeeeeelp with any ventilation ideas! Rating: 5