Blaze Kamado grill with the lid open

In this context, “dwell” simply means “lower.” Temperature adjustment on kamados is all about airflow, which you control using the vents (sometimes called dampers) on the top and bottom of the grill. Because fire feeds on oxygen in the air, the kamado will reach higher temperatures when the vents have a larger opening. Dwelling temperature, then, is as easy as closing the vents. This is a good piece of knowledge to have in your back pocket when you’re trying to sear a piece of meat but still need to complete the cook at lower temperatures.

Conversely, the more you open the vents, the higher the temperature inside your grill will rise.