Thermaflex 051710000003 - 10" M-KC R4.2 Insulated Flexible Air Duct
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Air Distribution

M-KC Features and Benefits:
  • Underwriters Laboratories listed, and complies with NFPA Standards 90A and 90B.
  • Core material will not support mold and mildew growth.
  • Highly resistant to rust and corrosion.
  • Fully lined for efficient air delivery.
  • Large diameter, heavy, spring steel wire helix assures dimensional stability, resists mechanical abuse and provides more efficient air delivery.
  • Bi-directional reinforced metallized jacket resists tearing - reduces chance of damage to vapor barrier.
  • Heavy woven and coated fiberglass cloth core assures quiet performance. Core is almost impossible to puncture or tear. No more concern about fiber in the air stream or loss of conditioned air.
  • Uniquely constructed core will not unravel when cut.
  • All components of M-KC are self-extinguishing and will not support flame (see oxygen index figures under application and engineering data). Core will not deteriorate in a fire until the temperature reaches the melting point of glass.
  • "Outward cast" of helix keeps duct core from shrinking up inside insulation and jacket, resulting in less waste.
  • Heavy woven and coated fiberglass cloth core will not "blow-out" and eliminates costly call-backs.
  • Lower installed cost.
  • Available through broad national distribution.

Lifetime Warranty:
Thermaflex warrants that the M-KC Flexible Air Duct will be free from defects in materials and factory workmanship for life. This warranty covers the flexible duct, materials and labor. This warranty applies only to ducts properly installed in accordance to Thermaflex's written installation instructions and under conditions specified in published performance data. Thermaflex shall not be liable to buyer or any third party for any special, secondary, incidental or consequential damages however arising.
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Name Thermaflex 051710000003 - 10" M-KC R4.2 Insulated Flexible Air Duct
Brand Thermaflex
Item Number MKC25R4.210
Manufacturer Product Number 051710000003
SKU - PIM Number 1408712641231
ERP Number 358260
UPC 677431000697
Unit of Measure EACH
Weight 17.4 Pound (lb.)
Length 14.1 Inches (in)
Width 10.0 Inches (in)
Height 14.1 Inches (in)
Hazardous Material No
EPA Cert Required No
Country of Origin USA
R-Value R4.2
Jacket Material Reinforced Metallized Jacket
Vapor Transmission 0.05
Application Air Distribution
Certifications Greenguard, GreenGuard Children & Schools, Greener Product, CHPS Member
Color Gray
Comments/Notes UL Listed - USA & CAN
Composition Fiberglass
Core Material Woven Fiberglass
Inside Diameter 10"
Insulated Yes
Maximum Air Flow 6000 FPM
Maximum Pressure Positive = 6" (4-10" ID) 10" (12"-16" ID) Negative = 2" (4-16" 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 16 inches (4"-10" ID), 10 inches (12"-16" ID) - Negative: 2 inch (4"-16" ID)
Warranty Offered 10 Year Parts
Compliance NFPA 90 A and 90 B
UL Listed Yes
UL Recognized Yes
Size 10" x 25'
Tier M-KC Flexible Air Duct
GEM - Case Quantity

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