I dropped my wife off at noon for her lunchbreak and told her to fill the woodstove because it had been 5 hours since the last feeding. I left and got a text about 5 minutes later that the house was 78 degrees and the stove was still hot. Not too bad for 3 rounds of boxelder and high 20's for outside temps. It is now over 13 hours later and the house is still 72 degrees with decent coals to start the overnight burn. Sure is nice not having to babysit a smoke dragon like the old days.