Cooling, lots of airflow
The Nine Hunderd case is all about airflow and Antec generously provides you with 3 TriCool 120mm fans, each has a separate fan speed selector (High/Medium/Low), the front 2 ones are equipped with Blue Leds. The eye catcher of the 900 is without a doubt the top panel fan which measures an impressive 200mm with huge fan blades and also a separate fan speed controller.
A steel grill with honeycomb design prevents objects from falling in, and at the same time keeps air flow obstruction to a minimum:
Similar honeycomb gratings can be found through the Nine Hunderd case design, the front panels covering the drive bays for instance:
The rear fan grill:
And the side panel fan grill:
The last grill expands quite a bit and takes up a large part of the side panel, the other area is filled with a plastic window which allows you to peak inside