I am looking to purchase 2 140mm Fan and 3 120mm Fan. But I am puzzled while it comes to “Air Flow: 44.71 CFM” but what does this indicate? While purchasing a novel fan I wish to the final air flow and the greatest fan I do not care regarding sound. I as well require a red led fan. Can some assist choose the fan? As well I am thinking of purchasing Corsair Hydro H70 High Performance CPU Water Cooler I observe this arrives with 2 fans I am speculating if there is any additional fan which I can purchase like a 2 red led fans for the Corsair Hydro H70 High recital CPU Water Cooler do you assume I should improve Corsair Hydro H70 High recital CPU Water Cooler fans with led one? The case which I am utilizing is Lian Li PC-V2120.