The in-line centrifugal flow fan has all the advantage of axial flow and centrifugal fans. i.e. straight airflow, light weight, compact and space saving design, easy installation, high-pressure stability, low noise level and low running costs. The fans are specially designed with build-in inlet cone to achieve high static efficiency and high volume flow. The performance range is from 50 up to 50,000 m3/hrs on air volume, at static pressure up to 3000 Pa.