4 Inch Insulated Duct - 25 Foot Length

Insulated Flex Duct UL 181 Listed R-6 Insulation Value

10 Year warranty

Using high quality insulated flexible ducting is a very important part of your exhaust/ventilation system.  Our research shows that the ducting here meets very stringent compliances with most all government agencies and building code requirements.  The ducting is manufactured in the United States.  The insulation used on the flexible duct has been awarded Greenguard Certification™, by the Greenguard Environmental Institute™.  The certification demonstrates that the product contributes minimal emissions to indoor environments.  To date, it is the only insulation of its kind to receive GREENGUARD Certification.  This insulated flex ducting comes in 25' lengths and is boxed.

UL & NFPA 90A & 90B approved.  Use the best possible insulated flex ducting around.

Specifications:

Core:

• Two tough plies of black polyester film encapsulate a steel wire helix.
• Rated pressures per UL-181: 10 in W.C. positive, 1/2 in W.C. negative
  
  Recommended maximum operating pressures:
• 6 in. W.C. positive for 12 in. diameter and under.
• 4 in. W.C. positive for 14 in. diameter and over.
• Rated maximum air velocity 4000 FPM

Thermal Characteristics:

• R-6.0 certified by Underwriters Laboratories Inc. and the Air Diffusion Council accordance with ADC Flexible Duct Performance and Installation Standards using ASTM C-518 at installed wall thickness on flat insulation only.

Vapor Barrier:

• This metalized vapor barrier is constructed using fiberglass scrim which provides an outstanding combination of strength and tear resistance.
• Perm rating of 0.04 perms when measured per ASTM E96, Method A.

Surface Burning Characteristics:

• Flame Spread: Less than 25
• Smoke Developed: Less than 50

Operating Temperature Range:

• -20 Degrees Fahrenheit to 140 degrees Continuous
• -20 Degrees Fahrenheit to 250 degrees Intermittent

Approvals:

• UL-181
• NFPA 90A & 90B
• HUD
• City of Los Angeles
• California Bureau of Home Furnishings
• Most Federal, State, and Local Codes & Standards.

Note: Duct cannot be returned if the box has been opened