The FDA series is DIDW centrifugal fans with forward curved impellers. The fans are suitable for supply or extract applications in commercial, process and industrial HVAC systems. Sizes of this series are in accordance with AMCA standard 99-0098-76 and DIN 323 R20.
Each fan type has its maximum operating speed and power due to its mechanical design. The operating limit of FDA series - fan type is
design to meet the requirement of class I, II and III limit as defined in AMCA standard 99-2408-69. The FDA series is available in type S, C, T and X.