I'm gonna guess 1.5 cubic foot on a warm day, and 2.5+ on a cold day for an 18 hour run. You ever see an Englander 17 firebox?
Thought you mite like that more better..... Gotta keep that pup warm and in the spotlight! He likes my fake rabbit fur hat.....in his mouth or under paw, so I gotta keep an eye on him!
I think my splits must be larger than most ...I seldom can get more than five in the stove, usually load four, often leaving space in the stove. My smaller splits average about 1 1/2 hour burn, medium 2 hours, large 3 hours, while Ironwood rounds, which I reserve for the coldest nights, will burn over 6 hours. Usually put one in the back of the stove, then load around with sugar maple. When I say that is how long the rounds will burn, what I mean is if I multiple the number of rounds a given size by the corresponding burn time, I pretty accurately get the burn time of the load. So, 5 medium rounds gives me a ten hour fire with lots of coals left. If it is mild out, I may wait an additional few hours, and still have plenty of coals for the next fire. The new load will have active flames in under a minute of loading the stove, be closed down for the long burn within fifteen minutes. So, on average, maybe 12 splits a day?
Yeah, I reserve the right to modify my answer when I load sugar maple and some old iron wood I found in the next few days when it goes. That might make a difference too since to date in new stove all Ive burned is mostly popular with some elm and birch mixed in...
I'd say 12-15 per day...but before y'all get too jealous, that's 90-120# of wood (wood furnace) and yes, I weighed it
i burn in an insert in the fireplace.my splits are varied in size. to keep it going all day it takes approximately 6 cubic foot of wood the best i can tell. your use might vary,don't try this at home, no warranty implied,restrictions apply.