9" x 25' KM R6 Flex-Vent Silver Flexible Air Duct - Box

Product Highlights

Flex-Vent 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
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Item #: 21739A

Mfg #: 053809000001

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Description

Product Highlights

Flex-Vent 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 whenmaking 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.

California residents: see Proposition 65 Warning

Specifications
Weight13.35 Pounds
Length15.13 Inches
Width24.88 Inches
Height15.13 Inches
Country of OriginUSA
BrandThermaflex
TierKM
R-ValueR6
Jacket MaterialVapor Barrior
Vapor Transmission0.1
CertificationsYes NFPA 90 A and 90 B
ColorSilver, Pink
CompositionFiberglass
ConstructionStrong 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 bidirectional reinforced metal
Core MaterialCorrosion Resistant Steel Wire Helix
Fire RatingMeets UL 181 & NFPA 90A-90B Fire Codes
Inside Diameter9"
InsulatedYes
Maximum Air Flow5000 FPM
Maximum PressurePositive 4''-16'' - 10wg, 18''-20'' - 6''wg Negative 4''-12'' -1wg 15''-20'' - 1/2 wg
Maximum Temperature250°F (121.1°C)
Operating Temperature-20°F to 250°F (-28.8°C to 121.1°C)
Pressure RatingWG - Positive 10 inches (4"-16" ID), 6 inches (18"-20" ID) - Negative: 1/2 inch (4"-20" ID)
Size9" x 25'
Warranty OfferedYes
ComplianceNFPA 90 A and 90 B
UL ListedYes
UL RecognizedYes
Documentation

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