Adjustable pitch fans are recommended for installations where air demands may change but continuous automatic control is not needed. Blade pitch is set externally at the hub to alter air volume or pressure. Aluminum alloy airfoil blades and hub assure reliable performance. Direct drive and belt drive.

Sensors compensate for changes in temperature, humidity, air flow, gas concentration or air quality by altering the blade pitch to increase or decrease air volume or pressure. Fan is ideal for VAV systems and for industrial applications requiring a constant environment regardless of air demand.

Compact Design 34 fans are designed for general industrial, non-VAV applications. Welded steel wheels, heavy gauge housings. Drive adjustment varies volume/pressure.