Active Air CO2 Regulator System with Timer, 1-20 cubic ft per hour

Active Air Product Documents Hydrofarm CO2 (1-20 cu ft per hour) with Timer Instructions Deliver growth-boosting CO2 with our user-friendly, easy to operate system. With its programmable timer, it will automatically maintain ideal CO2 levels for optimum growth. For small to medium size areas, select the COSYS; for larger than 10' x 10' areas, select the COSYS20.