The unit adopts the newly designed wide impeller with large diameter and slow
speed forward multi-blade impeller. The fan casing is strengthened with
reinforcing ribs for additional strength.

It adopts NSK bearings, ensuring small vibration and low noise in operation.

The unit adopts PEF heat insulating material and one-step forming process of
drain pan for thermal insulation, making it durable and good in heat preservation.

42CN adopts new national standard GB/T19232-2003. The noise level of the
unit is 3~5 dB lower than new GB.

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