The pan is reversible by turning valves and divided into 3 portions: 24x24 Flue pan with 4 drop flues, 18"x24" syrup pan, and a 6"x24" finishing pan. I used this pan over a cinderblock arch with a fan. I could get 10-15 gph when I paid good attention to firing. The arch including cinder blocks and a steel chimney with a damper are included if desired. A few of the blocks are cracked and should a be replaced. The liner blocks are solid 4x8x16. Feel free to make an offer.