Hello!The concept of a Proper Airflov Through A Computer Case is similar to a room's exhaust system. Cold air has higher dense, just like when you open your refrigerator, the cold air comes out below the door. for my experience, when applying it on a PC, it it much better to put many in-haust (in-take residing below the PC case) air than an exhaust one. since air naturally goes out the PC case. also consider the placement of your PC as it has an advantage of getting cold air near the floor, but the best place for a PC is on the table. The table area doesn't eat much dust and can absorbs levels vibrations which extends PC life more longer from maintenance. it is based on the experience/problems I've analyze from my work. the PC airlfow system is identical to a house's exhaust or air system.