Venturi nozzles for compressed air blowers represent an ingenious application of fluid physics in industrial technology. These devices exploit the principle of pressure reduction in a conical duct to create a powerful jet of compressed air, used in a variety of industrial applications such as cleaning, cooling, or transporting lightweight materials. By combining efficiency and simplicity of design, Venturi nozzles offer a reliable, cost-effective solution for many tasks requiring a controlled, powerful flow of air. In this text, we explore in detail how these nozzles work, their advantages and applications, and the considerations to be taken into account when using them.