I was looking for the thread that answers these questions but i couldnt find it. I'm wondering on the math equations to find out exactly how much co2 you need dispersed and how many times a day for how long. The room itself is 24' long, 8' wide, 7' tall. Id say there will be in the upper ends of sixty or more plants in there, were using light rails as well. if that matters at all. If you guys can help me out. Im not even sure what ppm would be best for the room.
try this: PROGRAMMABLE TIMER SETTINGSet your timer to go on continuously for 2.5 hours each day when your lights turn on. This time period will bring your room level close to the desired range. After this period, set the timer to go off for 15 minutes, then on for 15 minutes. Repeat this on/off cycle throughout the lighted period until 1 hour before the lights turn off. DETERMINING A FLOW RATEThis is the basic formula for determining flowmeter settings:cubic ft. of growing area x .0012 = A A ÷ 3 = B B ÷ 2 = flowmeter settingTo determine the flow rate for your growing area, follow the steps outlined below. Step 1 - Determine the cubic volume of your area: Room height x width x length = cubic volume Example: 8' high x 10' long x 10' wide = 800 cubic feet Step 2- Take desired level of CO2 (1500 PPM) and SUBTRACT existing CO2; 1500PPM - 300PPM = 1200 PPM. This is the amount of CO2 you need to add to raise the level to optimum. Step 3 - Multiply your room volume x .0012 (1200 PPM) to determine how much CO2 to add to your area. Example: 800 cubic feet x .0012 = .96 cubic feet. For practical purposes we will round this off to 1 cubic foot. This is the quantity of CO2 to add in an 800 cubic foot size room to reach the desired 1500 PPM level. Before continuing on to the next steps the following assumptions need to be established: FIRST ASSSUMPTION: The average growing area enriched to 1500 PPM of CO2 will return to normal levels in about 3 hours due to plant usage and room leakage. SECOND ASSSUMPTION: When calculating the flow rate for any growing area, this usage and leakage of CO2 should be compensated for in that particular area. Step 4 - Now for the 800 cubic foot room, we take the approximately 1 cubic foot of CO2 and divide it up over the 3 hour average period into 1 hour increments. There are 3 one hour periods in 3 hours. 1 cubic foot ÷ 3 = 1/3 cubic foot of CO2 (.333) This means that every hour an 800 cubic foot room needs 1/3 (.333) cubic foot of CO2 to replenish it back up to 1500 PPM. Because our system operates on a 15 minute OFF / 15 minute ON cycle, the flow rate setting should allow 0.1665 (or 0.2) cubic foot of CO2 to be emitted within each 15 minute ON cycle. To arrive at the appropriate flow rate setting we need to divide .333 by 2 (there are two 15 minute ON periods per hour) to reach the flow rate per hour (.333 ÷ 2 = 0.1665 cubic feet per 15 minutes of flow). For practical purposes, round this up to 0.2 cubic feet. This is the flowmeter setting. After following the regulator adjustment steps, set the flow with the flowmeter adjusting knob as described above.