So I am setting up my veg room right now and have no intention on using CO2 so I am circulating fresh air with one fan blowing in and one fan blowing out. I just finished and when I tested it, it appears that there is more air coming in because my plastic door is bowing out. I am wondering what would be best; Equal in and out, More air coming in, or more air being sucked out. I dont know any terminology here so lamen terms would be appreciated.