I never turn down elm for firewood, decent on the Btu scale; heat our house and shop and domestic hot water with an outdoor boiler so I'm not very picky with the species. Back in my younger days we burned wood to heat my parent's house and we had a fair amount of the DED that hit our woods; Dad always took elm if they were handy. Before we built a hydraulic splitter, we learned the trick to splitting elm with the maul was to wait til the temperature was below zero, the chunks would split without much trouble. 40 years later, I'm still using the same splitter, and run some elm through it pretty much every year.
2010 - 12 taps, turkey fryer, 4 quarts
2011 - 24 taps, homemade arch from old water tank, 16"x24" flat pan, 16+ quarts
2012 - 9 taps, 3 pints, what a season
2013 - 60 taps, homemade oil tank arch with 2'x4' flat pan, 16"x24" finishing pan on electric range, 55 quarts
2014 - 80 taps, homemade oil tank arch with 2'x4' flat pan, 16"x24" finishing pan on electric range, 40 quarts
2015 - 100 taps, 15 gallons
2016 - 115 taps, 13.5 gallons
2017 - 120 taps, 13 gallons
2018 - 130 taps, 11 gallons