Small Ventilation Fan with Carbon Filter

I am starting my first stealth grow dresser and I wanted to know what would be a decent fan to use that can have a carbon filter attached.

It is approx 4'x3'x2' so I would need a fan with a cfm of about 24. But with the attachment of a homemade walmart carbon filter i figure I would need to have around 40-50 cfm...are there any easily obtainable types of fans that wouldn't be too loud or expensive? i just want to make sure i can push air through that filter
 
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