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Ductless fume hoods are designed to protect personnel by filtering out dangerous fumes and vapors so that air can be safely recycled back into the work space in an energy-efficient way. These exhaust hoods are fitted with fans that force the air in a specific direction where it has to pass through several types of carbon filters including HEPA filters where pollution molecules are captured. Giving a high protection performance and biological safety, the ductless hood protects the operator from generated gases. Without the additional ducting system requirement, these enclosures are more mobile and flexible for positioning.