The setup: My special closet (135 cf) is hiding in a larger room (1008 cf). I am running a 400w hps w/air cooled hood. A 178cfm exhaust fan is running constantly (maybe running at 120cfm or less with ducting and filters?). There is also an oscillating fan inside the closet. The closet vents into the larger room, near the ceiling. I have a co2 tank with a timed regulator. I am aiming for 1500ppm. So how should I calculate my co2 needs? The co2 will vent into the larger room. The air in the larger room is then recirculated into the closet again. Any advise?
Oh yeah, and should i have the regulator on 15 min alternating on/off as recommended by the manufacturer? Or should it just be on since the exhaust fan is always on?
You may want to hold off on co2 enrichemtn until you can get some AC for that room. You exhaust will just pull it right out.
The exhaust fan is in the closet, blowing into the large room. The larger room is sealed and has an ac unit in the window.
Well unless it exhausts back into the colset your losin the co2. The sealed up and airconditioned method is optimal. And by sealed up I mean duct tape on the cracks etc. Now, regarding CO2 tanks...anyone have any info regarding adapting less expensive aquarium or other types of CO2 tank regulators to grow room use?
yea man if your exhausting your room constantly don't bother wasting your money on c02. You need to have an inline fan constanly blowing cool air through your reflector with an inlet outside ur growroom and an outlet outside your growroom. Then you need to figure out how long your room can be left without ventilation and your temps going to high or your humidity. Thats when you turn ur co2 on. Then you need to have your co2 turn off at night as well as when your ventilation fan turns on to bring cool air in and exhaust hot humid air out.