Double Inlet Centrifugal Fan

There comes a time when the single-inlet fan is not enough for ventilation systems in large industrial facilities. If facilities want more airflow in a single-inlet, single-width impeller fan, then engineers must need a huge-sized fan with a huge shaft, heavy bearing, giant motor frame and large ductwork connection flange.

But where the space is limited, such as in an AHU room, machinery room or a specific area in a factory, it can be a headache for facilities owners.

A Double Inlet Centrifugal Fan can resolve this problem with an excellent innovation. In this fan, the air goes in from 2 sides by 2 different inlets. An equal airstream goes in through the double-width impeller. As a result, the same air pressure, the same housing and the same motor but double airstreams. Another big facility is that the axial thrust load is distributed equally on the shaft because air goes in from both sides equally. Which is more beneficial for bearings and generates low vibrations compared to a single inlet fan.

Double Inlet Centrifugal fan generally comes with a backward-inclined impeller. Which has some special specifications like 80% to 90% peak aerodynamic efficiency, high airflows, expected pressures and VFD compatibility is available for variable-load systems.

This configuration delivers maximum airflow density in the most compact specific envelope. Which is suitable for most mechanical engineers, EPC contactors and plant managers to demand fans for large AHU systems, power plant cooling, industrial HVAC or high-volume process air handling.