i have a 4ft x 8ft tent that i run a top feed slab table in, with 2x 1000w hps. for venting i use 2x 6 inch blowers 475 cfm's. one blowing fresh air into the 6" vents on the hoods of the lights. the other is sucking the hot air out of the opposite 6" vents of the hoods, into a charcole filter on...