Comment 7 for bug 1252167

I think aD_ experiment is support for the opinion that the coal burners are not broken. I agree though that they are hard to use correctly in some sense and are special in the way that they consume more wares faster than most buildings. So I can also understand Teppo's opinion. For now I think it is best to not change them and instead have open ears if we might to revisit this topic in the future.