carbon scrubber sizing

you want to be able to scrub your entire rooms volume every 3 minutes right?

I am use to inline Ozone generators, but I built a small room and its very air tight. I want to be able to keep my Co2 in.

Is that a good rule of thumb? 3 minutes to scrub entire volume?

First figure room volume and divide by 2.5 that's the minimum cfm of the blower. Then take the blower cfm number and go at least one size up from what this chart recommends for scrubbing. http://www.phatfilter.com/what-size-phat-filter-do-i-need