Biomass fuel processing is a high-energy and capital-intensive industry that requires several types of DECENT MACHINERY fans. The process involves drying of feedstocks, fermenting of the processed organic materials, separation of the product components and energy recovery systems. The chemical processing develops several volatile organic compounds that are captured and treated. The storage areas for the ethanol product involve transfer and safety systems which require additional fan equipment. Additional fans are required in the recovery boiler area where steam is generated for process consumption.