Ventilation for 12 x 600w

[need4weed]

I'm running 12 x 600w hps in a 5m x 5m room. I have a 14in system air stratos AC fan connected to a 315mm x 1000mm carboAir carbon filter. The filter is rated at 6900 m3/h and the fan around 4200 m3/h. I have to run lights set to 400w to keep temps below 30c. Really struggling to keep temps down. Any suggestions on how the ventilation should be set up to deal with 12 x 600 would be appreciated

[flylowgethigh]

As I put thinking into airflow through a tent, inlet air seems important. I assume the fan blowing the hot air out isn't having to work against a restrictive inlet.

[mojave green]

Noobes alway get it backwards. How do I ventilate my desired wattage?
Try this: Use the amount of wattage you can properly ventilate!

[spandrel]

You must be in a very hot climate. There are many possible strategies depending on your grow style and climatic conditions