I must say that these are exceptional for my stove so far but I was also using exceptional premo wood. Red oak at about 16%. This is at about an hour and a half into the burn and went on for about an hour. Stove was at about 600 and the cat probe at 1600. I love my cat stove and the long controlled burns and it is small flames and glowing for the majority of the burn but I love watching a show like this.