Model FADP provide aerodynamic performance in a direct-drive design. The fiberglass panel fan is suited for corrosive environments or contaminated airstream applications. The wall box with mounting flange is constructed of UV inhibited Hetron 99 P polyester resin with Class I flame spread of 25 or less. The fan has an FRP airfoil axial impeller with a factory-set blade pitch for precise performance matching. The panel fan line is offered in diameters from 12 through 60” with capacities ranging to 50,000 cfm.