I am curious if only opening one vent causes the charcoal to burn unevenly since the air is coming in from only one direction. I am not an engineer and I hope one replies. I am a bean counter and everything has to balance for me, my OCD. I use all vents open the same and temps hold where I want them. Cold and Wind do affect my temps and it seems that there is no one method that works in all conditions.
WSM 22"; Weber Kettle 26 1/2, Vt.Castings Gasser