So looking for a second opinion to confirm something. I will be using a 10x9x8 room and have two fans for ventilation, should one be used to pull in air from the outside or both to exhaust air from both the lights and the room. They are both 450cfm inline centrifugal fans and two 1000 watt hps systems with great white 6'' reflectors. I do not have a co2 system and live in cali where humidity is little to no issue. Thanks!