| 摘要 |
<p>Air circulation and ventilation unit (2) provided including housing configured to fit at least partially over the ceiling of an equipment cabinet (1) including fitting over at least one vent (5, 8) in the ceiling of the cabinet so that the interior of the housing is in communication with the interior of the cabinet, housing includes housing vent (4) moveable between open position in which air flows between outside of housing and inside of housing and closed position in which little or no air flows between outside of housing and inside of housing, and controller (3) to control position of housing vent.</p> |
