Calculating How Much co2

Ok I know alot of us dont have the testers for co2 but still want to add it to the grow room, so I found this info on how to determine how much co2 to get it where you want.:thumbsup:

It is important that the correct CO2 Generator is purchased for a specific grow room size. If you purchase a generator that is too small
then it would burn for to long and heat up the grow area excessively. There are two ways to determine the correct generator size for your
needs. The first is to use the BGH CO2 Calculator. The second is to do the calculations manually:

Room Size â?? L x W x H = V eg: 12â?? x 15â?? x 8â?? = 1440 cubic feet



CO2 Required â?? Volume of room (V) x CO2 ppm required eg: 1440 x 0.0012 = 1.7 cubic feet of CO2. The desired ppm of CO2 is
1500ppm however, we need to subtract the ppm of CO2 that is already in the atmosphere (normally 300ppm). This leaves us with an
amount of 1200ppm (which equals 0.0012) that is required to be generated to raise the ppm in the grow room to 1500ppm.

Selecting a CO2 Generator. Each generator will have a CO2 output per hour. e.g. the Green Air CD-6 has a CO2 output of 6 cubic feet
per hour.

Burn Time â?? 6 cubic feet / 60 min = 0.1 cubic feet per minute. Therefore to produce 1.7 cubic feet of CO2 the Burn Time will be 1.7
cubic feet of CO2 / 0.1 cubic feet per minute = 17 minutes Burn Time.

Ideally you want to keep the burn time short as possible, preferably less than 10 minutes, thus the CD-6 burner will be to small for that
size room. A CD-12 burner would have been a better choice, the burn time would be about 8 minutes