Specification

GreenGuard Certified
for Superior Indoor
Air Quality
FEATURES AND BENEFITS
APPLICATIONS
Flexvent KM is a thermally insulated, fully lined, UL 181 Class 1
flexible air duct designed for low to medium pressure cooling and
heating HVAC systems. It can be used in either supply or return
sections and provides economical means for handling misalignment
between systems components and ducting around obstacles where
fabricated and fitted ducts are difficult and costly to use. It is equally
suitable for new jobs or retrofit work and is especially useful when
making system extensions or for changing conditioned zones, now
or in the future. Compliance to NFPA Standards allows you to
install lengths longer than the 14’ limitation applying to connectors.
It is a highly efficient part of the total duct system because the
smooth liner, the ample insulation and tough outer vapor barrier
provide good airflow, thermal insulation and a double air seal
• Underwriters Laboratories listed for the US and Canada.
• 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.
• Quality KM installations produce referrals that increase
volume and profits.
• Available through broad national distribution.
• Available in 4.2, 6.0, and 8.0 thermal application values.
• Available in both box and bag packaging.
Insulated: Yes
Diameter: 4-20 inches ID
Pressure rating: (WG)
Positive: 10 inches (4"-16" ID)
6 inches (18"-20" ID)
Negative: ½ inch (4"-20" ID)
Velocity: 5000 FPM
Temperature Range: -20ºF-250ºF cont.
R-Value: R-4.2, R-6.0, R-8.0
Meets UL 181 and NFPA 90A-90B Fire Codes
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INSULATED FLEXIBLE DUCT
Worldwide Sales Headquarters & Customer Service Department
381 Carwellyn Rd. • Abbeville, SC 29620
In the US, call 1-800-459-4822 • In Canada, call 1-800-263-3539 • thermaflex.net
12908_KM Sellsheet:Layout 1 12/14/11 8:03 AM Page 1