Base Section of Smokestack is 5' 10" tall and fits on a 4' wide Leader King Evaporator 2 additional Sections of 18" stack: One is 4' tall and the other is 8' 8" tall Top Section of 18" Stainless Steel Smokestack with flip open cover is 5'9" tall Bought used evaporator which came with this stack but already had a newer stack on our4x16 Leader King Evaporator