Flexvent KM is a thermally insulated, fully lined, UL 181 Class 1flexible air duct designed for low to medium pressure cooling andheating HVAC systems. It can be used in either supply or returnsections and provides economical means for handling misalignmentbetween systems components and ducting around obstacles wherefabricated and fitted ducts are difficult and costly to use. It is equallysuitable for new jobs or retrofit work and is especially useful whenmaking system extensions or for changing conditioned zones, nowor in the future. Compliance to NFPA Standards allows you toinstall lengths longer than the 14' limitation applying to connectors.It is a highly efficient part of the total duct system because thesmooth liner, the ample insulation and tough outer vapor barrierprovide good airflow, thermal insulation and a double air seal
GreenGuard Indoor Air Quality Certified and GreenGuard Children and Schools Certified
UL Listed - USA & CAN
NFPA 90 A and 90 B
Laminated Polyester Film
Complies with NFPA Standards 90A and 90B. Corrosion resistant steel wire helix. Fully lined for efficient air delivery. The outer vapor barrier is a jacket of fiberglass scrim reinforced metallized film laminate.