With a cat stove (and maybe particularly a downdraft cat stove), it seems that feeding it a few splits at a time all evening, is not an efficient way to burn. It would appear that it is much better burning a decent size load, so you can get things up to temperature, engage the cat, and then dial the air for the burn time or temperature you desire. With feeding a few small splits at a time, you spend much time in bypass, and fiddling with going between bypass and cat burning. This is all fine and good, but does make timing bedtime a challenge. If I just feed the stove a few small splits at a time, I can be ready to stuff the stove with the big overnight load just about any time. However, if I'm batch burning, particularly starting from a cold stove and house around 6pm each evening, it seems I need to size that first batch just right to get the house up to temperature (not too small), while still being ready to stuff in that last big load around 10pm (not too big). I've gotten this right a few times, but more often not, so I'm wondering how the rest of you cat stove burners handling this. BK owners are automatically disqualified. We already know you only need to load once per day, no need to re-state that.