Tangential Fan

What is a tangential fan?

Tangential (cross-flow) fans draw air in from one side of their long cylindrical impeller and discharge it from the other side as a wide, uniform air curtain. This design is ideal for appliances that require homogeneous airflow from a narrow but elongated outlet. They are widely used in fan coil units, air curtains, electric heaters, convectors, certain stove and fireplace systems, and cooling appliances.

Features

• Wide air outlet: Provides evenly distributed airflow along the full length of the impeller.
• Low-noise operation: Delivers smooth, quiet airflow at low speeds.
• Compact design: Can be installed horizontally inside appliance housings.

The model in this category is a tangential radial fan with a 180 mm impeller width as stated in the product name. Impeller width and diameter are the key dimensions that determine the fan's flow rate and compatibility with the appliance.

Selection as a spare part

When replacing a tangential fan in an appliance, the impeller width, impeller diameter, motor side (right or left), shaft dimensions, voltage and speed must all match those of the original fan. Mounting brackets and electrical connector type must also be compatible. A fan with different dimensions may not fit inside the appliance or may disrupt airflow.

Maintenance

The multi-blade impellers of tangential fans gradually accumulate dust and dirt, reducing airflow. Cleaning the impeller with a soft brush and compressed air restores the appliance's efficiency. Take care not to bend the blades during cleaning; bent blades cause vibration and noise. Noise from the bearing or bushing may indicate that the fan needs to be replaced.

Frequently asked questions

Where are tangential fans used?

They are used in appliances such as fan coils, air curtains, heaters and convectors.

Why does the motor side matter?

The end of the impeller on which the motor is mounted determines the installation position within the appliance. A fan with the motor on the wrong side may not fit the appliance.

Is replacing a fan difficult?

It depends on the appliance. Electrical connections and mounting brackets must be carefully removed and refitted.

Why has the fan become noisier?

Dust build-up on the impeller or bearing wear increases noise. If the noise persists after cleaning, the fan should be replaced.

Can the fan speed be adjusted?

This depends on the appliance's control system. Some appliances adjust fan speed in steps.

Are there other radial fans available?

For different types, see the volute and radial fans category.