Evening, gents. I have an old King Circulator that I have been heating my house with for several years now and what I have noticed is that when the tray under the grate gets past about halfway full, I have trouble getting high enough temps. But as soon as I empty that tray, it gets as hot as I want it, fast, and I have to damp the airflow. I have seen this over and over but I don't understand why. The ashes aren't piled high enough to impede the air coming in under the grate. Can anybody explain it to me? Thanks
