Flex-Vent KP Flexible Duct

Insulated Duct

Strong polyester film laminated and encapsulating a heavy, corrosion resistant steel wire helix, forms the inner core and supports a thick blanket of fiberglass insulation over a fiberglass scrim. The outer vapor barrier is a jacket of durable black polyethylene. Designed for low to medium pressure systems.

KP Specs

Diameter 4-20 inches ID
Pressure Rating (WG)
Positive 10 inches (4˝-16˝ ID)
6 inches (18˝-20˝ ID)
Negative 1 /2 inch (4˝-20˝ ID)
Velocity 5000 FPM
Temp. Range -20°F – 250°F cont.
R-Value R-4.2, R-6.0, R-8.0
GREENGUARD Certifications GREENGUARD Indoor Air Quality Certified
GREENGUARD Children and Schools Certified


Meets UL 181 and NFPA 90A-90B Fire Codes

This product can expose you to chemicals including Acrylonitrile, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.