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Characteristics：

 Large airflow rate, slow revolution speed

To supply large wind volume with very low revolution rate

Distinctions for other fans:

 Diameter 2.4m--7.3m

Design and engineering(the special fan blades)

Strengths：

To be silent, be efficient, without high speed airflow and noise

Almost maintenance-free(available for examination/hour)

low cost；

To decrease the influence of the air when frequently door opened and closed

To supply a stable and average temperature between ceiling and floor, wall to wall

To the most extent, cutting the costed pipe engineering for warming and air condition

 Uniqueness of blades

With the Whale Patent technology, in the same diameter, lager airflowrate is captured