plainly outside air, I rely on the temps available, the only days the room hit 90+ was when it was 98 outside (which is why it feeds from an adjacent room, with open windows); just lots and lots of fresh air. the room is 186 cu/ft, my exhaust is 400 cfm, it's slow but with the air being pumped into the room with my described intakes, I get circulation twice a mintue easily.
4x5 Reviewed by 4x5 on . New log, six plants, first time vegging w/HID All my previous grows were done with cfls and floro tubes, However this time my seedlings are under my 2 175w coated MV lamps and cfls, I finished the remote ballasts and re-oriented the bulbs in their reflectors this week. I must say I am quite impressed, all six seedlings cracked the surface last week under 6 cfls at 18/6; after that week my new hid setup was ready, within 2 days under these lights, all six have a first set of internodes, this never happened to me on previous grows with Rating: 5