Thanks again on the box, it seems to be rockin'. Today is day 1 of week 6. 4 plants - 5 weeks, and 5 plants - 4 weeks old (all from bag seed). So far it's looking like 3 sativa, and 1 indica from the first batch. All of the ones from the last batch have really broad leaves and look afghani to me.. but hey, I'm a noob and don't know squat.. learning fast though!

Ok - Ventilation; Exhaust - 2 x 50 cfm bathroom fans, with individual switches to disable/enable as necessary. That's what you're looking at on top. Input - 160 cfm eco fan (also on top) pumps air to the T at the bottom of the main grow chamber, each side of the T has a 4" Suncort duct booster pointing to the two inputs. The box is going to vented to the outside, but I'm waiting for some electrical work (18kw generator ) to be done before cutting the holes in the wall. I'm also going to have to use another 2x4 to add a spot to circ clamp the fan in order to raise the light to full height.

The light has a 6" suncort duct fan on the left side. It fit perfect into the 6-4" reducer. I used the reducers on either side and just capped them with vented covers on the back to keep any critters out.

I have a CAP AIR-3DN in the top which controls the intake/exhaust systems using day temp. During lighting < 24 hours, I'm going to plug a small heater in to maintain night temp. I may have to figure out some sort of shelf due to the 9 plants taking up so much room. I'm a little worried about it being too close to a pot and over heating the roots. There's only about 38 cu ft, plus the shiny material inside the box is duct wrap I put in for insulation.

I will make it a point to upload some frame pictures. I'd intended to document the build, but just ended up doing it..

Okay.. since we're supposed to be talking about growing here, I'll upload some plant pics a little later and you guys can critique the progress.. :jointsmile:

Later, Farmer Rich