The HL3-2A and HLF-6 mixed flow fans represent a new type of fan that falls between axial and centrifugal designs. These products feature an innovative design, a compact structure, a small footprint, low weight, high efficiency, strong pressure output, quiet operation, and straightforward installation. They are capable of replacing low and medium pressure centrifugal fans operating below 2000 Pa, and are widely used for air movement and dust extraction in both industrial and civil buildings.