Using the Corsair 450D Mid Tower for my build, for the top should I just add one or two fans as another exhaust?

Estrostra_2040

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Jul 7, 2014
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I'm getting the Corsair 450D Mid Tower for my build, It comes with two 140mm front intake fans and one 120mm rear exhaust fan. For the top should I just add one or two fans as another exhaust? I plan on using the Corsair Air Series AF120 Quiet Edition or Corsair Air Series AF120
Performance Edition.