Well some coal appliances normally run at 200 degrees some allot higher. And some pull the exhaust from the bottom some dont. There are lots of variablesplease explain to me HOW a chimney fire is possible with coal fired appliance? flu temperatures normally run at less then 200 degrees. exhaust gases are drawn through the bottom of the stove underneath the fire grate, no flames or sparks WILL ever touch the black stove pipe or chimney. also there is absolutely NO creosote, creosote is a byproduct of burning wood. so with no creosote, not enough heat for combustion of the combustion by-products and no sparks i dont see how it is possible.