Here is a Chart showing the general vicinity of temperatures to expect from your briquettes.
If you are saving your money to only get 1 Dutch Oven, I recommend a 12 Inch Size so you can bake a good sized round loaf of Sourdough Bread or a pie or a small pizza or such. Any smaller and they wont fit as easily, but then, I’ll bet you will figure out a way to cook just fine anyway!
I hope these charts are helpful. One of the coolest (hottest) things about Dutch Ovens is that as you are able to buy a second and third one, you will find they can be stacked for cooking multiple stews and breads and desserts all at the same time! It is amazingly efficient…but we will get more into that in later episodes.
Here are some of the Dutch Oven Basics to Budget for: (I have no affiliation with LODGE at the moment, but like that they are Made in the USA and have a good return policy.)