I have in my original plans to put a return air duct in the media closet but the people who installed the air ducts didn't put one in and asked me to call him first. I talked to him today and he said that when you suck the hot air out of the room it puts strain on the A/C unit and what he recommended was to install an 80 CFM bathroom style exhaust fan vented through the roof. He said he can put the fan on a wall switch or add a temp controller to come on when the temp gets a certain temp it will turn on.
In the closet I am going to install a Chatsworth 8ft rack where I will run all my A/V components for the whole house like the network router & switch, Denon receiver, 2 or 3 cable boxes, HDMI Switch, xbox 360, ps3, power cleaner, and a future 11.3 AVR to power the media room.
Less strain on the A/C system per the technician?
Other builders use the fans that exhaust through the attic for media closets and not through return air.
Too loud to leave on during a movie in media room?
Potentially use unnecessary power if left on (using an on/off switch)?
The closet door will likely remain open when not in media room so plenty of cool fresh air. I might even put a perforated door up instead of the normal door to make sure air gets in.
I am looking for advice on which route you'd take and why.