Model SQ Centrifugal Inline Exhaust fans are direct drive, compact, and offer multiple mounting configurations. Fan wheels are centrifugal, backward inclined, and constructed of aluminum. Fans are designed for indoor use with a maximum operating temperature of 130 degrees F, and are stocked 115/1Ø with UL-705 label, NEMA 1 disconnect switch. Key features: Compact size for height-restricted areas, Aluminum backward inclined, nonoverloading centrifugal wheel design, Inlet and discharge duct collars for easy duct connection, Removable access panels permit easy access to interior components for cleaning and servicing, Energy efficient, Vari-Green motor for maximum motor controllability Certifications: AMCA Sound & Air Performance, UL/cUL 705