Ready-to-install, 16-ga. steel, 19”W panel includes mounted 4.7” (120mm) diameter whisper-quiet fans with front guards. Each fan has a 50 cfm airflow rating and a quiet 28 dBA noise rating. The panel includes either a standard black 6’ cord or a green “thermocord” which has an integral thermostat to control fan operation. The thermostat automatically turns fans on when the ambient temperature hits 86?F (30?C), and off when the temperature is 72?F (22?C). This power-saving feature ensures efficient operation, while saving wear and tear on fans.