The WDW is an induced draft, counterflow design closed circuit cooler with a capacity range of 456 to 37,708 MBH (134 to 11051 kW). Standard construction includes the patented, high efficiency Thermal-Pak® Coil and G-235 (Z600-Europe) galvanized steel casing and basin. Type 304 stainless steel construction is available for the basin or the entire unit.