Kit for single 4.7” [119mm] diameter fan with 50cfm airflow rating and quiet 28dBA noise rating is great for spot cooling. The cast aluminum housing is 4.7” square x 1.5”D [120mm square x 38mm]. It includes a fan guard and cord — standard black or green “thermo-cord” which has an integral thermostat to control fan operation. The thermostat automatically turns fans on when the ambient temperature reaches 86?F [30?C] and off when the temperature reaches 72?F [22?C]. This power saving feature ensures efficient operation while saving wear and tear on the unit.