I am not trying to argue with you, but as I stated above I have been burning my native east ky coal in a Buck Stove insert designed for wood since 1983 the year the stove it was installed. I don't mean like 1 or 2 times a year, I mean probably 40-50 days per year. Almost anytime the temp got under about 30 degrees. I do like to use a iron grate in the stove for wood but you can burn coal fine without it as long as you postion the coal it so it can get air underneath it, like on top of some kinlin.
You also have to keep your fireplace damper open, and keep in clean. I also have a close neighbor who does the same thing as has been as long as i can remember. I am not saying everyone should do it, or its the right thing to do eithically, or that it might not be dangerous with certain stoves or whatever. Just saying it can be done.
Thanks everyone for the stove information. We debating right now between a model made by Applatichian stoves, and the hitzer which the salesman recomended. I will keep anyone interested posted of my results this winter.