ABP is the ideal solution for belt drive panel fan applications. The ABP offers aerodynamically efficient performance within a heavy duty welded steel frame and panel construction. This powerful fan is available in diameters from 24" through 60", with capacities ranging to 44,600 cfm. The ABP panel fan has a factory set adjustable pitch impeller for precise performance matching. The airfoil axial impeller is constructed of spark resistant die cast aluminum.