Draft-Air India Pvt. Ltd. Offers Centrifugal Fans for Industrial Applications. Draft-Air India Pvt. Ltd. Is an ISO 9001:2000 registered organization. The Centrifugal Fans for Industrial Applications features high efficiency, low noise, cleans air, handling light dust or large solid particles. The Centrifugal fan impeller designs produced by Draft-Air include SWSI, DWDI, Material Handling Fan, Pressure Blowers, Process Fans and High Temperature Fans.