The P Setting is a Pause Setting for the pellet feed auger into the burn pot. A higher P Setting number means the auger is paused for a longer period of time before more pellet fuel is loaded into the burn pot.

Therefore, with a higher P Setting, there is more smoke production as the pellet fire will smolder for longer. However, a higher P Setting also means there will be wider temperature swings.

So a higher P-Setting number has its Pros and Cons.