I have a old Fisher wood stove, with a shaker basket. My parents used it for years when I was young! I usually heat totaly with wood, b/c I have a 30 acre lot and plenty of it. I decided this year to give coal a try. I heard that soft coal made a mess, so I looked around, and found hard nut coal, for a good price ( $227 a ton ) So I load up my dump truck with a load of nut coal. I made a good hot fire in my wood stove, and the shaker basket was half full with Hot coals, and still some large chunks of oak, burning good. The temp on my therm read 550* I add 1 ash shovel full of nut coal, to the hot coals. It was like the coal, put out the fire. I gently racked the coals, and and spread them out. I closed the door, and open the air inlets all the way. The damper is fully open also. About 1/2 hour later, I went back down, and the temp gauge read 450*. Once again I add one ash shovel full of nut coal, we are talking basically a dozen pieces. Once again it was like a was trying to put out the fire. I gently racked around the pieces so they weren't so pilled up. I shut the doors. About an hour later I checked the fire, and it was 250* and almost out, but a little blue flame. Now is this normal? Am I doing something wrong? I am used to haveing a stove top temp of 600* and being toasty warm. With these temps with coal, I couldn't even get toasty. So whats wrong, or is it just me and this is what I should expect?