Maximum airflow is 330, 660, or 990 cfm, and noise ratings range between 45 and 49 dB. ODXXX Series fan trays have three, six, or nine fans in 24 and 48-Vdc versions. Assemblies are available with custom controls including alarms, PWM inputs, tachometers, and constantspeed systems.

Orion Fans, 10557 Metric Dr., Dallas, TX 75243, (800) 323-2439,