Double-Inlet Centrifugal Fan
Double-inlet radial (centrifugal) fans that draw air from both sides, for air handling units, fan coils, and cooling equipment: low-noise, high-flow models.
Products (1)
Brands: Gamsan
What is a double-inlet centrifugal fan?
In double-inlet centrifugal fans, the impeller is designed to draw air from both sides of the casing. This configuration achieves a higher flow rate than single-inlet fans of the same casing size. The impeller is generally connected directly to the motor, which is most often housed inside the impeller. Thanks to their compact design and quiet operation, they are widely used in air handling units, fan coil units, and cooling and ventilation equipment.
Applications
- Air handling units and packaged air conditioning units
- Fan coil and air curtain units
- Indoor units of cooling and ventilation equipment
- Heat recovery units
The model in this category is a radial double-inlet fan defined for cooling and ventilation applications.
Selection as a spare part
When replacing a unit's fan, the impeller diameter and width, casing dimensions, mounting connections, motor voltage, speed, and rotation direction must all be compatible with the existing fan. Comparing against the fan code specified by the equipment manufacturer is the most reliable method. A fan with different performance characteristics may alter the heating or cooling capacity of the equipment. For the electrical connection, the motor's capacitor value and wiring diagram must be taken into account.
Maintenance
Because the impellers of double-inlet fans consist of many thin blades, they are sensitive to dust buildup. Regular cleaning of the equipment filters delays contamination of the impeller. During impeller cleaning, care must be taken not to bend the blades; any imbalance causes vibration and noise.
Frequently asked questions
What is the advantage of a double-inlet fan?
It moves more air in the same footprint and generally operates more quietly.
How is a fan coil fan replaced?
After the power is switched off, the fan assembly is removed; the connections are noted and the new fan is installed in the same manner. It is recommended that a qualified technician carry out this work.
Is the motor inside the impeller?
In many double-inlet fans, the motor is housed inside the impeller. This design saves space.
Can the fan's capacitor be replaced?
The capacitor may be a separate component. When replacing it, a capacitor with the same capacitance value must be used.
Why is the fan noisy?
Dust buildup on the impeller or bearing wear causes noise. Cleaning should be the first step.
Where can I find single-inlet radial fan options?
Browse the centrifugal fans category for other models.
In which equipment is a double-inlet fan used as a spare part?
Air handling units, fan coil units, and some cooling equipment are the most common applications. Always compare the dimensions of the existing fan before replacement.