The AllerGard model NU-620 is an Animal Transfer Station (ATS) designed to provide sterility to laboratory animal through laminar downflow air over the work zone and improved technician allergen protection by creating a dynamic air barrier at the opening of the work surface. Model NU-620 is available in two configurations. A dual-sided unit allows for flexibility and multiple users while a single-sided unit offers greater containment at the front of the station.