So my CPU fan pulls air from the cooler and blows it towards the case fan. If I could make a tunnel between the CPU fan and the computer case, then I would not need the case fan since the CPU fan would cool the CPU and pull air out of the case. This way noise level would be reduced.
Does such a tool exist? Or what's the best way to make it myself? I would imagine that tunnel is 120X120mm in cross-section, flexible in shape, and fixed using the 8 fan screws and holes.