Closet Grow Room with 2000 W

Hi, I'm not exactly a newbie but I wanted to get some input from you guys on a closet grow room. Here's the deal:

Grow Room: 5'x5'x8' ceilings.
Lighting: 1- 1000W Hortilux HPS
1- 1000W Hortilux Blue - MH
Vents: 2- 6" AC cooled Hoods side by side
System: 2'x4' Aeroponics System

Problem is ventilation. Here is what I'm thinking and this is where I need advice. I'm thinking about getting a vortex 8" 747 cfm inline fan, running 6" ducting into a 6"x8" tee and venting into the adjacent closet into the next bedroom to equalize the air temp before going into the AC system.

Or, should I vent this straight into the attic? My house is fairly new and I don't know where the air would come from to exchange with the air being vented to the attic unless I leave a window open. It's texas and it's hot so it defeats the purpose.

So, would you vent to another room or the attic? Thanks for your help.

I GOT THE SAME SHIT YOU GOT. I GOT A Y PIPE CONNECTER WITH 2X 6" OUTLETS AND 1X 8" OUTLET. I PUT MY VORTEX 8" IN THE ATTIC HANGING FROM THICK BUNGEE'S SO YOU GET NO VIBRATIONS.. RUN MY INSULATED 8" FLEX FROM THE FAN TO THE 8" PORT ON THE Y CONNECTOR. THEN I RUN A SINGLE INSULATED 6" DUCT FROM EACH SIDE OF THE Y CONNECT TO EACH LIGHT. AFTER THE FAN I RUN MY 8" INSULATED FLEX AL THE WAY DOWN TO MY ATTIC VENTS AT THE TOP AND END OF MY ATTIC SPACE. WITH THIS MY VENTALATION IS GREAT. I HAVE A PORTABLE AC UNIT INSIDE THE 5X5 ROOM WITH ITS EXHAUST GOING STRASIGHT UP INTO THE ATTIC IN ITS OWN HOLE BUT I DONT VENT THE AC EXHAUST BUT JUST A FEW FEET INTO THE ATTIC. MY TEMPS STAY STEADY AT 73-76 ALL DAY AND DROPS 15 AT NIGHTTIME. HOPE THIS HELPS, BUT THAT'D BE WHAT I;D DO BRO......

awesome man, thanks. i'm glad to know that setup will work.