This high capacity product utilizes a high efficiency, backward curved wheel to achieve flows to 300,000 CFM and pressures to 40". It is positioned to continue on where the AF Fan line leaves off extending nyb's high capacity fan lines volumetric airflow capability. BC Fans are designed around four static pressure points; the BC 15 and 20 utilize a wheel design with no center blade reinforcements while the BC 30 and 40 each use unique reinforcement designs to achieve required speeds.