Best answer: The most optimal configuration for fans inside the Corsair 275R Airflow is a push-pull setup with the front panel acting as an intake.
[h=3]How to configure fans inside the Corsair 275R Airflow[/h]The Corsair 275R Airflow can take up to six case fans, depending on whether you choose 120mm or 140mm blowers. One 120mm fan can be installed on the rear panel, either one 140mm or two 120mm up top, and three 120mm or two 140mm on the front panel.
Full story from the WindowsCentral blog...