Quote Originally Posted by ugexe
Let me first start by saying this will be my first controlled grow... i've only done some guerilla growing prior to this. Anyway the cabinet I plan on using is http://www.lowes.com/lowes/lkn?actio...926&lpage=none

The inside will be covered in mylar. I have the 6 plant aero machine with a 400watt HPS (Hortilux bulb) lamp over it. Thats the basics of it. As for ventilation I plan on using a 265cfm dayton fan and doing a little homemade carbon scrubber filter for it. I'm planning on using one of those temperture switches so when it gets above the temp range it will turn on the fan and open the exhaust and intake vent (the ones that have a solinoid to open the vent when it gets power). The intake will just be a passive one, with a pipe leading up towards where the SCROG screen will be. I'll probally also do the whole homemade yeast CO2 deal since there is room. Something else I considered was getting 2 of those humidity switches... I have a small cool mist humidifier and a small desktop dehumidifier that I could hook up to those switches to keep the cabinet at the right humidity level at most times... but i'm not sure if humidity control is worth that big of an investment (the switches are $120ish each). As for what i'm growing... it was going to NL but I got jipped there so its probally going to be some high mid bag seed.

So thats about the jist of it. I have most of the stuff together, but I wanna see what you guys think I could do to improve my design! It was quite fun coming up with it I must say.
Your setup is somewhat similar to mine....

http://boards.cannabis.com/showthread.php?t=55703


You're going to want a dedicated fan for your light. I have two 180cfm fans... one is exhaust for the cabinet, the other it dedicated to passing air through my sealed hood.

It's still barely enough. I also have a 6" axial fan for a passive intake.... but I can turn it on and it's a 265cfm intake fan in a heat disaster.

In addition to those, I keep two 6" fans running at all times inside the cabinet to circulate the air.

With all this, my climate controller (AIR-3) keeps my exhaust fan on most of the time. My CO2 is not even hooked up for this reason.

I'd recommend a cool tube hood for your light....

http://tinyurl.com/ovb3p

.... with a dedicated fan for it.... a 265cfm squirrel cage with intake should do nicely. I like Active Air blowers over Daytons...

In addition to that, I'd run another squirrel cage for exhaust at the top of the cabinet... a 265cfm with no carbon scrubber... or something in the 400-500cfm range if you have a carbon scrubber.

Then... I'd have three 4" passive intake fans at the bottom of the box (cheap computer fans work great... just don't plug 'em in.

With a setup like this.... you could probably effectively run your CO2 and maintain a decent temperature in the cabinet (under 80 degrees or so).

I'd use a bottle/regulator setup for CO2 though... that way, you can make sure that none of it goes to waste. With a controller like an AIR-3 (only $170), the CO2 will shut off when the exhaust fan goes on... and when your light goes off.

Good luck!!!

Have fun too!