I got the dumb idea to come up with a system to burn wood Pellets when temperatures are moderate. So I made a metal container with legs, drilled a lot of holes in it, and set it in front of the primary air control. Kindling was used underneath. As the fire grew and the Pellets burnt, I cut the air back. In this picture the primary control is closed. I am getting about 15 minutes on a handful of Pellets.