We've been burning ash alot for 3 years what with so much available here. The ashpan load seems on a par with oak and maple. Good heat and burn time, it seems to light right up (it seasons fast) with yellow flame at first and then mellows out to a good slow outgassing for long blue slow flames. The only problem with standing dead (and specially fallen dead) ash is that it turns punky very fast after dying. The dead standing ash we collect needs sorting because the wood has veins or whole branches and fractions of the trunk that got fluffy or pithy, real quick. You'll see some parts, even in the same trunk or branch, nice n' solid/dense and some spongy. Surprising you've not nabbed alot more of these trees, we are near you on at Patterson Rd. and 108th St. (NW corner of Barry County) and curse the EAB, there are victim ash trees EVERYWHERE here.