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Thermaflex 053808000004 - KM Silver Flex-Vent Insulated Flexible Air Duct, R6, 8'' X 50' Box

Item: FD08R650
MFR: 053808000004
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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 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.


NameThermaflex 053808000004 - KM Silver Flex-Vent Insulated Flexible Air Duct, R6, 8'' X 50' Box
Gemaire Item NumberFD08R650
Manufacturer Product Number053808000004
SKU - PIM Number1448875861209
ERP Number344357
Unit of MeasureEACH
Weight24.9 Pound (lb.)
Length14.1 Inches (in)
Width26.9 Inches (in)
Height14.1 Inches (in)
Hazardous MaterialNo
EPA Cert RequiredNo
Country of OriginUSA
Jacket MaterialVapor Barrior
Vapor Transmission0.1
CertificationsYes NFPA 90 A and 90 B
CompositionStrong 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 RatingMax Flame Spread = 25
Inside Diameter8''
Maximum Air Flow5000 FPM
Maximum PressurePositive 4''-16'' - 10wg, 18''-20'' - 6''wg Negative 4''-12'' -1wg 15''-20'' - 1/2 wg
Maximum TemperatureMaximum = +250
Operating Temperature-20°F to 250°F (-28.8°C to 121.1°C)
Pressure RatingPositive 4''-16'' - 10wg, 18''-20'' - 6''wg Negative 4''-12'' -1wg 15''-20'' - 1/2 wg
Warranty Offered10 Year Limited
ComplianceNFPA 90 A and 90 B
UL ListedYes
UL RecognizedYes
GEM - Case Quantity