Active Air 6" Flange
Help your Active Air fan operate with a filter at its most efficient and effective capacity by installing a corresponding Active Air flange. Available in sizes that match our entire line of Active Air filters, the flanges include sealing foam and six screws for an easy fit. Connect these flanges to ducting, and not directly to the fans themselves. Regular flanges come in 4 inch, 5 inch, 6 inch, 8 inch, 10 inch, and 12 inch.