Available in 3 models with choice of 24, 36, or 48 in. widths, Purair 5 Fume Hoods feature ductless design that enables them to be positioned over sink or benchtop apparatus. Face velocity of 100 fpm ensures containment of fumes and particulates for operator protection, while alarm alerts operator when airflow falls to unacceptable level. Main filter can be chosen from 14 different types of carbon, which include specialty media for vapors of organics, solvents, acids, mercury, and formaldehyde.