carbon scrubber question

how big of a fan should i buy for a room with 500 cf, is a fan that can change the air out in 2 min sufficient? so like something inthe 250-300 cfm inline fan with a 6 inch carbon filter with matching specifications

go to www.greners.com they have great prices and a conversion calculator to help you decide the size you need.
http://www.phreshfilter.com/selector.php
It took me a long time to find a place with great prices and service. good luck. I hope i am not violating any online treaties here...lol