AirFlo-NBV Upblast Roof Exhaust Fan 18 inch 4100 CFM Belt Drive 3 Phase NBV18-D-3-T

Designed for smoke, heat and fume removal in situations requiring the motor and drive components to be located outside the airstream.

FEATURES
Utilizes Model NB tube axial duct fan with cast aluminum spark-resistant propeller standard
Heavy gauge curb cap continuously welded to prevent water penetration
Butterfly damper section, mill galvanized construction, with damper blades that open when fan is energized and close weathertight when unit is off. Dampers rotate in nylon bearings on a stainless steel axle
Butterfly damper section removable as a complete unit for access to propeller Combination weather cover/belt guard
Motor and drive components located outside the airstream. Fan suitable for use in dry environments up to 180°F