The 4-72 series centrifugal air blower is ahigh-efficiency and energy-saving cen-trifugal fan. A radial fan with curved airfoilblades, impeller front disk, and cone. Arc-shaped inlet collector and other structuresmake the fan have excellent aerodynam-ic performance. Adopt new energy-saving pure copper movement, plus thickfire-fighting and high-temperature resis-tant plate, good heat dissipation and insu-lation effect. Fast, efficient, and silent. Longoperating cycle and low energy consumption.