Centrifugal Exhaust Fan

For exhaust applications, the most suitable types are backward‑curved and radial centrifugal exhaust fans. The advantages of backward‑curved over forward‑curved fans for exhaust duties include:

In forward‑curved fans, the small gap between blades means that even a slight buildup of grease or residue on the blades can significantly reduce airflow capacity and drastically lower efficiency.

Backward‑curved centrifugal exhaust fans generate less noise compared to forward‑curved types.

The overall efficiency of a backward‑curved centrifugal exhaust fan is higher than that of a forward‑curved fan.

For the same size, the power consumption of a backward‑curved centrifugal exhaust fan is lower than that of a forward‑curved fan.

One important consideration for all rotating equipment—including centrifugal fans—is static and dynamic balancing. Proper balancing not only enhances performance but also helps prevent vibration, resulting in quieter operation and extended equipment service life.