CleanAire II Ductless Hoods from HEMCO Corporation are designed to meet DH I requirements as defined by SEFA 9. The hoods feature a built-in carbon filtration system to adsorb non-toxic fumes and odors and are equipped with an integral blower, vapor proof light, fan, and light switches. The hood superstructure is constructed of a chemical and flame resistant non-metallic no-rust composite resin with a molded one-piece seamless interior fume chamber. A vertical sliding clear acrylic sash protects the user and contains the process fumes. The carbon filter that is included adsorbs the fumes and then recirculates the air back to the laboratory. The hood is available in 24-, 30-, 35-, and 47-inch models and is shipped completely assembled and ready for operation.