I get 8 cords ready and burn 4 to 6 and have about 2 left for the next year. Most the wood I burn is on the smaller size. Oak ,maple, ash, birch. My stove is 10 years old and the second Cat is done. Ill need a new one this year. They state that big tempture swings cause them to crack Ie a hot fire then add wood that may be wet or have snow on it can cause a swift drop in cat temp and cause cracking. Id would like to see the new cat design.