Gotta love it! This morning after 10 hour burn I opened the air and got the stove good and hot again with the coals that were left. An hour later I put 4 splits in for some coffee drinking heat. In the high 30's out but will be mid 60's. Engaged the cat and the cat temps rose nicely cut air to about 30% and the cat was steady in the mid 1300's. For some reason it decided it was backpuff time.