I use both nut and stove in my Yukon-Eagle coal furnace. I like nut, because I can get a longer burn on those really cold days, but I also like stove, because it takes off pretty fast! Larger surface area on the chunks I suppose. This morning is an example. I began shake down at 0440 (loaded up with stove @ 1600 yesterday - nice 12 hour burn). Started layering on fresh stove coal, and by 0500 furnace was purring along happy as can be! It's 0520 now and all is well. To my senses nut seems to burn hotter than stove, so I'm using stove coal until it really starts getting cold, like below 10degF or so. Wife doesn't like windowstats, so I try to keep things on low burn while temps are in the 30s and 40s. I've been known to mix things up too. When I have a pile of nut burning, after shakedown I'll get the coal pile going again with stove, then later back to nut. Depends on my mood I suppose!