A damper assembly for use with an axial fan to prevent air from entering the discharge side of the fan when the fan is at idle. The damper assembly includes a damper door having multiple sections. The sections are able to pivot independently in response to the air flow created by the fan to minimize airflow resistance when the fan is operating.
1. A damper assembly for a fan, which comprises: a) a first door pivotably mounted adjacent a discharge side of the fan and configured to pivot about a first axis, the first door having a first section and a second section with the first section able to pivot to an open position independent of the second section; andb) a second door pivotably mounted adjacent the discharge side of the fan and configured to pivot about a second axis, the second door having a first section and a second section with the first section able to pivot to an open position indepe...
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