can use static pressure fan for air flow
See STEP 2 on page 4. Static Pressure is the resistance to airflow (friction) caused by the air moving through a pipe, duct, hose, material. There is a variation of axial flow duct fan that uses a blower wheel instead of a propeller. It is. referred to as a Tubular Centrifugal. We do not make any tubular centrifugal fans at Cincinnati Fan.