UQFP-4D Number of Fans: 4 Features: -Thermostatic, proportional fan control.-100 CFM cooling capacity (4 Fan model), 50 CFM cooling capacity (2 Fan model).-Digital processor varies fan speed based on enclosure temperature for ultra quiet operation.-Front rack panel temperature and alert display provide instant system status.-On-board digital processor monitors rack temperature via external sensor.-Local and remote notification of over temperature and fan fault to control system.