u can get a 6 inch like 350-400 cfm on ebay for UNDER $120
dj00140 Reviewed by dj00140 on . Exhaust fan? Is there any cheaper way to find a 300 CFM fan than paying $150-$200? Would taking apart an Oscilatting fan (so that it is just the cage, motor and fan blades) and installing it into the sealed growbox work? Or buying a wall mount fan and putting it in the box work? Rating: 5