I burn kiln dried pine almost year round , rejects and cut offs from a molding shop. They wont take wood over 10 percent, so its dry, dry. I burn daily this time of the year, but the level of ashes NEVER goes up. Ive had about 1 inch in the fire box since last year. Dont get me wrong, not dealing with ashes daily is great, BUT where do they go? I just cant wrap my mind around them dissapearing, lol. has to be the dry wood I guess?