Simple diagram for setup of a climate controller

This diagram illustrates how a climate controller is hooked up to fans and a CO2 Generator. The fans plug into one side of the climate controller and the CO2 control device is plugged into the other side. When the fan side turns on the CO2 side is turned off. If you are using a climate controller that has a photosensor like the CT-DH-3P, then the CO2 side will turn off when the lights turn off, and will turn on when the lights turn on.