Operated as low as 60 fpm, Protector® Premier® hoods have interior with molded, one-piece, fiberglass-reinforced polyester liner that offers fire-resistance and facilitated cleanup. Eco-Foil™ air foil, featuring Clean-Sweep™ airflow slots, lets clean air continuously flow through to create constant, protective barrier of protection from contaminants. Automatic air bypass system, preset fiberglass baffle, and vertical-rising tempered safety glass sash with cable pulley also are standard.