Yeah I have been wondering if my ventilation is too strong. I have a 4x4. I use a 6 inch AC infinity t6 with speed controller and no carbon filter for exhaust. It is set on 4. For intake I have a cheap 6 inch duct fan with an analog speed controller. It is at its lowest setting. My main problem is I'm in AZ. Humidity outside right now is 7% and my house is 25%What do you use for extracting your air I put my fan on a controller and lowered it slightly in my 4x4 tent and it upped my rh as I was taking all the air out a little fast that worked for me also I use the bottom flaps for incoming air