I built the arch total of 12 long 3 feet wide. It is 2 inch insulation and have fire bricks for 36 inches of it. It has cast iron grates that are 36 inches long but fire box is 66 inches long for plans to make air over fire, It can be used for 8 inch deep flue pan or as the pan I have on it is 3x7 raised small brothers reversible soldered stainless with sap warmer and float pan. The chimney was taken down a heavy winds and neighbors trampoline (so no chimney available), but it was a 12 inch chimney but could be made any size. The front pan was made 304 stainless tig welded reversible 3x3 made by Smokey Lake last Febuary. I have at the right conditions gone through average of 100 gallons an hour. Will sell pans separate for right price. Have a 3 x 7 steam hood with about 10 feet of chimney for it (15 inch diameter) Have more pics but could not get uploaded