I recently upgraded to a Lopi Liberty. Last night was the first overnight burn with low of 24/no wind. I loaded the stove up with mixed whatever I had handy at 9:00. I really didn’t pack it tight at all and used medium size sticks. Woke up at 5 with a good bit of coals, stove still throwing a lot of heat, and the house 72. Our house is 1950 sq feet with the stove in the main open area with a 18 foot vaulted ceiling. Our last stove was a little small for this space and we really had to push it to keep warm. Although not a really bitter cold night, I’m very impressed with the lopi. It throws some serious heat!!