Verotec has introduced new versions of its intelligent and standard fan trays that offer increased airflow and lower noise. The intelligent versions now have a maximum operating temperature of 70 degrees Celsius.  The increased airflow and lower noise are the result of a new computer-optimised aperture pattern. The intelligent units operate at half speed up to 35 degrees Celsius, increasing to maximum at 55 degrees Celsius. If the temperature exceeds 71 degrees Celsius, the fans all increase to full speed and an overheat alarm is generated. Warnings are also generated on thermal sensor failure and power fail. If one fan in a bank of three fails, the remaining two fans increase to full speed and again an alarm is generated. Monitored trays, in which all the fans constantly run at full speed and an alarm is generated on fan or power fail, are also available.