HEMCO offers the most complete line of Laboratory Fume Hoods. HEMCO UniFlow Aire-Stream Fume Hoods are constructed entirely of chemical resistant, flame retardant, non-metallic composite resin materials and features an exclusive “Unitized” construction that does not require screws, bolts, rivets or metallic hardware to assemble. The UniFlow lines of fume hoods are available in sizes to suit your exact requirements, from 30” to 96” wide. Offered in bench mount and floor mount models, custom sizes can be easily modified to suit special needs. UniFlow Hoods include Low Flow Constant Volume and Variable Air Volume models. Process specific models are PVC, Polypro, Phenolic or Stainless Steel lined for Perchloric Acid, or Acid Digestion.