Champion 12000 CFM DownDraft Roof Evaporative Cooler Motor Not Included Motorpulley sold separatelycombination to be determined by application requirements Area coverage dependent on motor selection Cabinets made from heavygauge galvanized steel to resist weather and impact All metal surfaces treated for corrosion with electrostaticallyapplied UVstabilized polyester powder finish Bolted construction for easy installation and access to replaceable parts Onepiece bottom pan for leakproof operation keeps maintenance low