Hi every1 What is the deal with Co2 and ppm (HELP)

FlyLikeAnEagle said:

Do you have a regulator?

Click to expand...

1. Determine the size of the room in cubic feet (CF). This is done by multiplying the length by the width by the height of your room. If your room measures 10? long by 10? wide by 8? high, then your total CF is 10 x 10 x 8 = 800 CF.
2. Determine what your desired level of C02 is and subtract the existing amount of C02 that?s already present in your room. Most growers will prefer about 1500ppm (parts per million) of C02. Plants will respond to up to 2000ppm, but this amount is generally not used since plants will utilize such high levels only if every other aspect is in perfect balance (which is extremely difficult to achieve). In general, there is about 500ppm of CO2 already present in the atmosphere if you live in a big city, around 300 if you?re in a less populated area. Assuming that there is 300ppm present where you live, you would have to add an additional 1200ppm in order to reach your target level of 1500ppm.
3. Determine how many CF of CO2 you need to inject. Multiply the volume of your room by the amount of C02 necessary to raise the C02 ppm to the target level: 800 CF x .0012 = 0.96. We will round 0.96 up to 1. Therefore, in order to raise the ppm level in your room to 1500ppm, you will need to inject 1 CF.
4. Determine the flow meter setting. Assuming that after 3 hours C02 levels will return to normal due to plant use as well as leakage, we will divide the 1 CF of C02 into three 1 hour increments. 1 CF divided by 3 = 1/3 CF or 0.333. Therefore, every hour an 800 CF room needs 1/3 CF of C02 in order to bring it back up to 1500ppm, and so your flow meter should be set to 0.333.