In a sealed room setup, the co2 shutting off while the fans run = fail. You will be amazed at how quickly a crop can suck the co2 right our of the room and be NEEDING more. If the co2 isn't there, your plants stop growing. Then they die.
Even in an unsealed room, if the co2 shuts off you still lose all the co2 thats in the room out the exhaust of the fan. What if your fan is turning on constantly, then that means your co2 is not only shutting off constantly, but it's also getting sucked out the room constantly.
Spend more and get the sentinel cppm-4. Allows sealed room applications, which is kinda where co2 is meant to be used, atleast efficiently.
If you want another cool toy that works well with the sentienl is the titan controls mercury 3 day/night fan controller. Adjusts fan speed automatically according to the temperature parameters that you set, and instead of just turing the fans completely on or off, it slowly increases/decreses fan speed to keep temps at a constant. If you fans are running in on/off mode, then you could be getting temperature spikes through out your lights on period.
And always get way more dehumidifier than what you think you need.....trust me.
