ATCO's 500 Series is a UL 181 Class 1 Air Connector which meets the requirments of NFPA (90A & 90B). 500 Series is manufactured with a tough double ply duct wall construction. 25' lengths, which can easily be cut to desired length, are compressed and packed in small, easy to store cartons. The 500 series is air-tight and is designed for low to medium operating pressures in HVAC systems.
Durable metalized polyester construction - tear and puncture resistant - low maintenance
Flexible and Maintains shape - easily handled and installed - low labor cost
Air-tight - energy efficient
Encapsulated wire helix - no unraveling when cut to length - quick installation