Presents the results of theoretical research by scientists, carried out scientific work to determine the length of the shovel of a centrifugal fan wheel. A technological scheme for installing a shovel on a fan wheel disk has been developed Analyzes of these works are carried out, which show that the length of the wheel shovel has a significant dependence on the parameters of the wheel (R, R1), the angle of installation α and the radius of the arc R3 of the shovel. An analytical dependence is derived for determining the length of the shovel of a centrifugal fan wheel depending on the parameters of the wheel (R, R1), the angle of installation α and the radius of the arc R3 of the shovel. With the following values of the parameters of the fan wheel R=630 mm, R1=340 mm, angle of installation α0=100 and radius of the arc R3=200 mm, the length of the shovel is equal to L=154.29 mm. On the basis of the above mentioned dimensions, in the electronic version, the blades have been developed and the theoretical values and the difference that does not exceed 0.1% are compared
