The practically designed cube modules available for sizes 630 and larger enable users to isolate the fans from their surroundings with rubber isolators or spring elements in order to ensure even quieter operation. An optional guide profile set is still available so the fans can be easily inserted into AHU equipment. There are no grounds to fear flow losses thanks to the aerodynamic design of the cube struts. They can be easily floor-mounted with horizontal or vertical motor shaft. Depending on motor size, the centrifugal fans are also available with the proven support bracket for mounting on equipment walls. Wide optimum efficiency range Their wide optimum efficiency range and static overall efficiency of 68% make it possible to operate the fans over a wide range with low power consumption, an advantage if it becomes necessary to change a ventilation system’s operating point, for example due to changes in the duct system. Another reason to change operating points could be gradual clogging of the filters in the AHU equipment. The wide optimum efficiency range is the result of ideal interplay among all of the fan’s components and the smooth speed control typical of EC motors. Airfoil blades for reduced weight Like the RadiPac with support brackets, the cube modules are equipped with the special Airfoil blades made of aluminum, which lower the impeller weight while increasing both stiffness and efficiency. Extensive aerodynamic improvements for all RadiPac models increased the efficiency by more than 13% over earlier models. Air performance levels up to 40,000 m³/h The RadiPac fans with cube design are available now in sizes from 630 to 1,000. With drive power of 0.5 to 12 kilowatts and sizes from 250 to 1,000, air performance of up to 40,000 m³/h can now be achieved with the RadiPac centrifugal fans from ebm-papst.