My current flowering box is only about 120cf. My vortex blower aerates 420cf. Basically my fan can renew the air of a 420cf room every 5 minutes. I would soooooo love to drop in a CO2 booster in there but i really think personally it would be pointless. Every once in a while i drop in a bucket of whatever im fermenting to get some extra co2 in there but it really doesnt do that big of a difference If you asked me tho, and i had bunch of cash to throw around and nothing better to spend it on. Yeah, sure, why not!?!
Mixed opinions on CO2 use on GC. There are many ways to add CO2 too your room. I am just because I found a good deal on the tank and reg. A little research will give you at least 5 options on how too do it.