Thermaflex 053705000003 - KM Silver Flex-Vent Insulated Flexible Air Duct, R4.2, 5" X 50' Box
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Air Distribution

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
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Name Thermaflex 053705000003 - KM Silver Flex-Vent Insulated Flexible Air Duct, R4.2, 5" X 50' Box
Brand Thermaflex
Item Number FD05R450
Manufacturer Product Number 053705000003
SKU - PIM Number 1373629090977
ERP Number 232777
UPC 677431001458
Unit of Measure EACH
Weight 12.0 Pound (lb.)
Length 11.0 Inches (in)
Width 11.0 Inches (in)
Height 60.0 Inches (in)
Hazardous Material No
EPA Cert Required No
Country of Origin USA
R-Value R4.2
Jacket Material Laminated Polyester Film
Vapor Transmission 0.1
Application Air Distribution
Certifications GreenGuard Indoor Air Quality Certified and GreenGuard Children and Schools Certified
Color White
Comments/Notes UL Listed - USA & CAN
Composition Fiberglass
Core Material Laminated Polyester Film
Features 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.
Fire Rating Meets UL 181 & NFPA 90A-90B Fire Codes
Inside Diameter 5"
Insulated Yes
Maximum Air Flow 5000 FPM
Maximum Pressure Positive = 10" (4-16" ID) 6" (18-20"ID) Negative= 1/2" (4-20" ID)
Maximum Temperature 250°F (121.1°C)
Operating Temperature -20°F to 250°F (-28.8°C to 121.1°C)
Pressure Rating WG - Positive 10 inches (4"-16" ID), 6 inches (18"-20" ID) - Negative: 1/2 inch (4"-20" ID)
Warranty Offered 10 Year Parts
Compliance NFPA 90 A and 90 B
UL Listed Yes
UL Recognized Yes
Size 5" x 25'
Tier KM Flexible Duct
GEM - Case Quantity

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