whats good buk...well i know more or less whatchu goen through wit liven up hea in da northeast but ventilation isnt that difficult a problem to handle imsure u'll figure it out jus keep in mind mainly fresh air into the grow area and then used air coming out of the grow area also heat rises so get the fresh air coming in from base level of where the cups are at and have the vent out towards the top usually above the light i'd segjest a rastafan setup cheap and it works e.i. look up turtles post for info..also the 24 hour lighting period's what im on and i switched to 24 from 18 without experiencing any shock they love the light..good luck wit da grow last words for advice patience truely is a vertue...holla