Fume hoods are essential for the containment of dangerous fumes and for the protection of occupants in the lab. Health and lab safety guidelines require stringent handling of fumes and appropriate technology to ensure proper air quality is maintained. Ductless fume hoods offer recirculating air flow and contaminant removal through exchangeable filters, face velocity control, audible alarms, and other features. These ductless enclosures do not require dedicated ducting to fresh air and as such can offer cost savings compared with ducted hoods. Digital controls, maintenance alerts, and operation logging are advanced features to consider when shopping.