Thanks to recent logging operations (tops piles) and multiple severe wind storms I have access to almost unlimited amounts of aspen and it is all drive-to (much of it has fallen across my roads). Makes a guy question the decision to work harder to get better species. Seems every good chunk of hardwood I find needs to be skidded or carried which effectively doubles to triples the time needed to process. My sauna stove burns it all without complaints. Aspen burns quick but also hot, does not smell bad, and does not leave excessive ash.