Designed to guarantee laboratory conditions and researchers remain safe at all times, the chemical fume hoods protect against flammable or toxic chemicals. Laboratory fume hoods act as protection devices that have clear sashes that slide horizontally or vertically into place and support high working visibility. Constructed for maximum chemical resistance, the leak-proof enclosures will not corrode even with heavy routine use and corrosive spills. The chemical fume hoods circulate and filter air to eliminate possible vapors produced. VWR offers ductless fume hoods that filter out dangerous fumes and vapors.