Hi Gotmudatv,

When I built the grow box I did the following for ventilation, though I did not incorporate a carbon filter at the time:

1. Air Intake - 2 x 4" inputs with 2 x 4" duct fan in line to push air in. These are shown in the pics on the bottom of the main grow chamber.
2. Exhaust - 2 bathroom vent fans mounted at the top of the cabinet. I tied their outputs together into a single output line.
3. Light - 6" ducting with a duct fan inline that pulled air through the vent on the back of the cabinet exhausting it out the other vent.
4. Things were hotter that I expected and I added the blue 150 cfm squirrel cage fan you see on the top of the cabinet.
5. CAP environmental controller to turn it on and off based on temps. This also controlled the small heater you see inside the box.

Regarding the lights movement, definitely needed.

For the carbon filter, in my rooms now (no more cabinet) I pull air through the filter and out. If you can place your filter above the light, and your fan to pull air through the filter on the outside, you'll have more room to grow. Keeping it stealthy doing this would be more of a challenge..

Good luck and let me know if you have more questions.

Peace,

Farmer Rich


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