400 watt digi ballast. The best MH and HPS bulbs. A 445 cfm 6 inch inline fan for the light and a 175 cfm 4 inch inline fan for the tent. A 9500 btu portable AC unit. A bunch of ducting. I'm blooming in six 2 gallon smart pots. Vegging in beer pong cups.
The grow space is half my closet. It is 21" x 27" x 56" It has a divider and a small dresser within it, as you can see. The other side of the closet has my clothes and stuff, as well as a lot of ducting and fans.
This is my second grow. I constantly tinkered with this space throughout my first grow. Never got it dialed in very well, but I learned a lot. Still took 6 ounces off of four plants. I took what I learned and my less restricted budget and built what I think is the best closet-tent I could get in here. I put into it as much as I thought was reasonable considering the small amount of plants I can fit in there. Then I put in a little more. I've had a few good tests in a row now, and I can almost say for sure that I've achieved the most important goals for this grow: Purple temps and ultimate convenience. Temps/humidity are easily controlled and maintained as low as 66/38 with lights on and tent closed. This means that I can grow big purple buds in my closet and I don't have to be at my house every 12 hours for the rest of my life (to open and close the tent.).
Both exhausts are ducted to a hole in the closet that goes outside. You can see from the photos that the intake to the tent and the intake to the light are directly ducted to the portable AC. The large piece that is taped to the AC unit stays in place without the tape. It is there to seal air leaks. Its gonna have weather stripping instead, with a little tape to seal leaks, so I can take it off a lot. I won't be running the AC always. I'll have a Stanley Blower going into the intakes sometimes, with the tent open sometimes too with an oscillating fan...in the earlier days mostly. And I don't need the AC at night cause it gets real cold in there with just the one 175 cfm tent exhaust fan.
The two shelves in the bottom are four inches apart, and the tent intake comes in between them. I'm hoping this will force a lot of air through the smart pots, which will sit on the top shelf. The bottom shelf is for runoff collection trays during hand watering.
For now, with this space, I don't think it gets better than this. Am I right? Can you see any improvements I can make? How should I make my DIY carbon filter considering how my exhaust runs?