Energy-efficient enclosure cooling

Rittal air/air heat exchangers need less maintenance than 
fan-and-filter units, in part thanks to their individual controls 
for the internal and external fans and easy-to-remove cassettes.  


The internal temperature within the enclosure is also constantly
 displayed so users can tell at a glance that the unit is operating optimally. If temperatures within an enclosure get too high then a floating
 fault signal will sound to alert the user immediately about an 
impending problem.