I bought a 10" carbon scrubber and a 10" Max fan from the local grow shop. The guy in the shop told me to pull air through the scrubber and just let it circulate in the room. I thought I had to vent it out of the room but this guy said that I dont have to. Is this true? My room size is 864cf. Im venting the heat from my lighting with a 6" inline fan and using a window unit for fresh intake. Will I have problems or will this set up be fine?