The Vent-Box ductless filtration system from Air Science USA, Fort Myers, Fla, is designed to protect laboratory personnel from chemical vapors found inside standalone chemical safety cabinets. The unit utilizes the company’s multiplex filtration system, a unique configuration that includes a prefilter and main filter to create a chemical, physical, or combination architecture to adsorb, neutralize, or trap target chemicals or particulate. Constant negative pressure removes vapors and particulates from the cabinet’s interior. Fumes are pulled via a flexible hose connected to the cabinet, and clean, filtered air is returned to the laboratory, eliminating the need for external ducting and minimizing loss of treated, conditioned air from the facility. The unit is is available in a variety of configurations. For more information, visit Air Science USA.