C-ALU shape has been designed to produce higher airflow rates, while ensuring high efficiency and low noise emission levels. C-ALU impellers are thought to be employed in high-temperature and corrosive environments and are manufactured assembling airfoil profile blades made of aluminum, with a light aluminum alloy hub. The impellers are available in configurations with 5/9/12/16 blades. Blades are available in two models: regular (CL) and short (CL-S) blades, with left setting angles ranging from 25° to 50°. C-ALU fans can produce a sucking or blowing air flow.