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Rapidz

Heavy Duty Inline Duct Fans

Heavy-duty inline duct fans are installed within ducted ventilation systems to move air along the duct route. This range contains metal-bodied centrifugal and inline models with different connection sizes, mounting arrangements and performance data.

11 products

Project buying guide

Duct duty and fan performance

Heavy-duty inline fans are selected for a specified airflow and pressure duty within the duct system. The wider inline duct fans range includes other constructions and connection sizes.

Send your BOQ
  1. 01

    Connection size and required flow

    A nominal duct size describes the connection, not the impeller diameter. The room airflow calculator can establish a volume-based flow requirement; the duct layout then determines the resistance the fan must overcome.

  2. 02

    Reading the performance curve

    Use the airflow available at the required static pressure. Maximum airflow and maximum pressure are separate limits unless a performance curve places them at the same operating point. Bends, grilles, filters and other duct components affect the duty.

  3. 03

    Installation and maintenance access

    Provide suitable supports, the permitted mounting orientation and access to the motor and service sections. Submit a BOQ with airflow, external static pressure, duct connections, air temperature and quantities.