Quote Originally Posted by AllforMe
Hello! I am in week 2 of my first grow, growing 10 plants in rubbermaid bubblers. I have 2 cabs, side by side about 3.5'x3x6.5' tall each. they are in the end of a narrow base,ent section, so ventilation is thru the front only. I have passive vents low (about 6x8 inch sqarues with filter paper and a light diffuser made of rubber black matting used to non-slip the inside of toolbox drawers. I have 4 inch inline fans about 80 cfm exhausting outside, and I plan on hooking up carbon filters. I have 2 flourex floodlites, a 65 watt and a 100 watt on the seedlings, and would like to opt for a 400watt mh. The front venting makes air cooling hoods difficult to fit. I was wondering if anyone thinks that my fan left on all the time would be sufficient cooling, along with a 9" oscilating circulation fan inside the cab. Or, maybe one of the 170 cfm inlines. This upgrade would be a better option than craming an air cooled hood in there. If that's the case, I would need a supernova type hood as the inlines with the 6" duct would not make the turns to vent out the front. Right now the intake in the room is very cool, around 60degrees, thinking it goes up to 70-75 tops in the dead summer (maybe less, it is a cool basement!) Right now the flouros run the room around 73-74 when the fans run constantly, ive been doing 15 min on/15 off (constraints of my timer) and the temp cracks 80 to 81 tops for a few min before the exhaust cycles. Any advice would be greatly appreciated!
I'm too stoned to picture your set up lol, but 70's-81 is fine, actually I always liked 78 for some reason. But having issues with it being cold at night sucks, like low 60's so you don't want that. You always want some ventilation in there at all times, I'm assuming this is all sealed? so you want to replace air a lot, at least every 5 mins.
those little occilating fans are wonderful too :thumbsup:

That MH would be a great, but then you are looking at a lot more heat then what you have now.