My brother is having three Mountain Ash Trees removed and he asked the tree guy about using it as firewood. I figured its about a cord, it would save him a bit on a few seasons worth of gas. The tree guy said it was no good for firewood as it turns white and spongy after it has been cut and will not burn good. As I have gotten older, my trust in certain people has been slowly diminishing, I am not a cynic but when it comes to dealing with people that can gain from someones naivety or trust I get fired up. I have seen too much in the way of unscrupulous activities as people are becoming more cut throat to survive. Here's the Dilemma, I am trying to convince him to save a good portion of the wood for firewood and for my pit, I offered to do all the chainsawing and splitting myself. I think hes reluctant because of what the tree guy said... and who knows, he may be spot on! I am not worried about flavor of the wood as I will use this as a two part fuel source if need be. When I burn unwanted woods I will only use that wood when foiled or if the food is covered. I went through a good amount of bug infested ash this way, hell why use up my premium wood when I don't need it, this works out great because I get rid of a lot of junk wood this way. Here's the only info I could find and there's no first hand use experience with this species that I can find. Rowan: Also called mountain ash (but unrelated to the common ash) this tree produces a decent firewood. Rowan: A good heat and reasonably slow burn. Also known as Mountain Ash. Not an ash but related to the Rose family Mostly deciduous trees. However, Eucalyptus regnans, which is sometimes called Mountain Ash, is an evergreen tree 2) "Mountain Ash is a name used for several unrelated trees. It may refer to: - Eucalyptus regnans, the tallest of all flowering plants - Fraxinus texensis, an ash tree species in Texas - Trees in the genus Sorbus in North America (mainly U.S.A.) - In Ireland and Britain it is used exclusively for Sorbus aucuparia which is also commonly known as Rowan" Sorbus subgenus Sorbus (genus Sorbus s.s.), commonly known as the rowan (primarily in the UK) or mountain-ash (in both North America and the UK), with compound leaves usually hairless or thinly hairy below; fruit carpels not fused; type species Sorbus aucuparia (European rowan). Distribution: cool-temperate Northern Hemisphere. (Genus Sorbus s.s.) I'm calling BS here. Anyhow.. any advice or first hand experience would be greatly appreciated.