I have never tried for a record or kept track... also I like to play with the stove, so it often gets reloaded even when I could have skipped it.
24 hours is pretty common when it's so warm you hardly need a stove.
You won't see any such burns in the middle of the winter though... My lil stove has a lot of house to heat.
Since the air in is thermostatically regulated, the fan speed has a huge impact on burn burn times (and heat output). Room temp probably has a noticeable impact too (check out Tarzan's 48h story above).
If I was a stove company wanting to set a crazy record without modifying the stove, I'd put the stove in a small well insulated area, play with the flue length until the lowest air setting kept the cat active, leave the fan off, and pack it full of some BTU-intensive wood like hedge or locust. (I'd probably melt the plastic knobs off of the poor thing before the cat went inactive.). The limiting factor in burn time there is how many feet of roxul you have packed around your 'stove room'.
. (I bet nobody ever thinks to ask, "128 hours on a 2 CF stove? Was it 650 degrees in the stove room?").
@BKVP- Why did you take Doug fir? Just because it was handy, or is there a technical reason that I am not understanding?