Inline centrifugal fan VENTS VKMz 250 – inline duct fan, model VKMz 250

Inline centrifugal fan VENTS VKMz 250 is a duct-mounted ventilation unit designed to provide air extraction and supply within ventilation systems. The VKMz 250 is built for inline installation inside ductwork, moving air along ventilation channels while saving room in occupied spaces. This model is suitable for residential, commercial and light industrial environments where efficient axial-to-centrifugal airflow transition and compact inline mounting are required.

Advantages

The fan combines centrifugal impeller dynamics with an inline casing to deliver stable airflow and increased static pressure compared with simple axial inline fans. Its compact cylindrical design allows integration into existing duct networks without significant reconfiguration. The construction emphasizes compatibility with round ducts and straightforward mounting while minimizing vibration transfer to the duct system. Materials and assembly provide durability for continuous or intermittent operation in typical ventilation applications.

Suitable for

• Supply and exhaust ventilation in apartments and houses
• Bathroom and kitchen exhaust systems
• Ventilation in small offices, retail spaces and workshops
• Inline boost in duct runs to overcome pressure losses

Key specifications

• Inline centrifugal configuration for installation inside round ductwork
• Cylindrical casing compatible with standard duct diameters
• Centrifugal impeller for higher static pressure compared with direct-drive axial fans
• Designed for continuous or intermittent ventilation operation
• Balanced rotor to reduce vibration and noise transmission

How to use

Install the fan within the duct run at a point that optimizes airflow and access for maintenance, ensuring the airflow direction marking on the casing matches the intended duct flow. Mount the unit on vibration-isolating brackets or flexible connectors to reduce transmitted noise. Connect electrical supply following local wiring regulations and the manufacturer’s wiring diagram. Provide sufficient straight duct length upstream and downstream where possible to stabilize flow and avoid sharp bends immediately adjacent to the fan inlet or outlet. Perform a functional test after installation to confirm correct rotation, airflow and absence of unusual noise or vibration.

Usage recommendations

For reliable long-term performance, periodically inspect the fan for dust buildup on the impeller and casing, check mounting fasteners and vibration isolators, and verify electrical connections. Keep the surrounding duct sections clean and avoid locating the fan where condensate or heavy particulate matter can accumulate. When selecting placement, consider accessibility for maintenance and sufficient clearance for electrical connection and airflow measurement.