The last two nights we've been below zero. I'm burning a pre-EPA Timberline, with secondary air mods. I'm also heating with pine, and that's it. Last night I loaded the stove w/ 3 decent splits, and 1 -8"round. 11pm. to 7am. this morning, and the stove and flue were both at 400 degrees. OK, a fluke I thought, yet I did snort and giggle into my morning coffee. %-P So the wife leaves at 10:30 am, and throws two splits on prior to departure( United Airlines employee), and I come home 8 hours later, and the stove is still 200+ degrees. I load it E/W with 4 splits, to slow down the air draw from the two "air control knobs"on the doors, hence a slower burn, and the darn thing has idled @ 675 for two hours. The flue temp. and stove are running almost equal. To me, this should not be happening with Pine. I'm not really complaining, but still- I've been going 24/7 for the last couple of months, and have already gone through a cord+. Is this an outside temp. thing? Kinda weird, but wonderful.