No BackDraft - Backdraft Control System for Wall Fans - Brochure

The most efficient fan backdraft control system for any air-filtered barn. Ensures total peace of mind  and unfailing 24/7 reliability, year after year. The least expensive mid and long-term overall solution. Built to last, contrary to fan socks that are known to be subject to wear and tear, requiring regular costly replacement in the mid and long-term, which also creates recurrent risk of herd contamination.