Despite real high winds here last night, I was able to achieve an honest 14 hour burn with these rounds. Beech,hickory,locust setting #2 got the fire going at 730pm by midnight the house was way too warm (main part)80*kicked her down to1.5 and at 930am house was 74*no complaints here reloaded at 300*with a partial load,white oak won't touch her till 6pm tonight.Bedroom with door closed off stayed at a comfy 65*.I might actually figure this beast out by winters end.The rounds on fresh splits all from the same area of woodshed showed 15 to 17% mc splits not shown too small for the conditions last night.