Carbon Filter size?

Ok so I know odor is going to be a problem for flower and drying. What size carbon filter should I get for growing up to 5-6 plants, also what's a good site I can get one for a nice price (not expensive). Plants are going to be grown in a 3x2x4. 4 feet tall 3 feet long 2 feet wide.

The size of your ventilation depends on the size of you room and the power of the lighting you are using, any of these should be fine but do the math and be sure before you order. www.ebay.com/sch/i.html?_trksid=p2050601.m570.l1313&_nkw=carbon+filter+fan+combo&_sacat=0&_from=R40