The flange is used to connect the Can-Filter to the ducting or Can-Fan®, this is for airflow out of the ventilated area. Flanges range in size from 4 - 14 inches depending on your specific needs.
— Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days.
For more information, please visit the manufacturer CF Group's website.