The Panda FEED design includes three flue gas water foggers in the ductwork, while the Mustang design does not include any temperature control in the flue gas conditioning section. In addition to the cost of the fogging system, corrosion concerns necessitate a change from carbon steel ductwork to stainless steel downstream of the primary fogger, further increasing costs. This pretreatment step is absent in the Mustang FEED where all ductwork is carbon steel.