i was asking for airflow more then humidity control although i know humidity is important
Airflow only matters if the air that is circulating is lower in RH than what you are trying to dry.
Airflow only moves air. Dry air flows around what you want to dry, pulling humidity out of it and into itself. Then the air flows away, so new dryer air can come in and the cycle continues.
It's not really about air flow, it's about controlling the humidity of the air that is required to dry your product.
If the air you are moving has a higher RH than you want your product to have, it doesnt matter how much air is flowing. Conversely, if the air you are moving has a lower rh than your end product, it will pull the moisture out. The lower your RH, the more it matters how much airflow you have. Higher airflow equals higher moisture exchange. Leaving your flowers lacking flavor and having a hay like taste.
Controlling the environments RH directly removes all of that nonsense.
Once the RH I the tent gets to a level you set, the humidistat turns the exhaust fan on, lowering the RH in the tent till it gets to a level you set and it turns off. Ensuring the RH in the tent is never too high or too low. From there a small usb fan or literally anything that keeps the air in the tent moving.