My Auber with 6.5cfm fan can't keep up. Auber had me adjust the P value, to no avail. Thinking I may need to order a unit with a 10cfm fan.
It works to perfection on the 22" kettle, and supplementing the Pit Barrel when a barrel full of meat stalls.
But on this I have to supplement the air supply just to maintain 225. It has no problem picking up on the temp deviation and responding, but it evidently is not pushing enough cubic feet per SECOND.