ventilation would not be a problem, i got 2 window a/c units for the closets going to 2 exhaust fans and charcoal filters. i have a 400w a 250w and a 600w hps set-ups, sux but its what i got......my previous waterfarms grows ive average 4-5 ounces a plant (max was 2 plants at 1 time = 9.5oz using flora nova grow/bloom and northern lights big bud).