Model CSP Inline Cabinet Exhaust Fans are designed for clean air applications where low sound levels are desired. Low sound levels are achieved through quiet running forward curved wheels. Lower CFM levels are attainable with the use of an optional solid state speed controller. Key features: Vertical electrical access to eliminate drilling holes, Large electrical junction box for easy wiring, Adjustable mounting brackets for multiple installation conditions, Embossed, galvanized steel housing for rigidity, Speed controllable motor, Easy access to internal components through access panels Certifications: AMCA Air, UL/cUL 507