Atco 13102418 Flexible Air Duct 18in X 25ft R-8

Product Description

The ATCO 13102418 is an 18-inch diameter, 25-foot length R-8 insulated flexible air duct designed for low-to-medium pressure HVAC distribution systems. The inner core is constructed to be air-tight, reducing leakage losses across the duct run. The outer jacket is a metallized polyester film reinforced with a tri-directional fiberglass scrim, providing durability and resistance to handling damage during installation. This product carries UL 181, Class 1 Air Duct certification, making it suitable for use in residential and light commercial forced-air systems. Licensed HVAC technicians and sheet metal contractors are the primary installers of this product type.

This flexible duct is used in residential and light commercial HVAC applications where branch runs connect supply plenums or trunk lines to diffusers, registers, and grilles. The R-8 insulation value is commonly specified in Climate Zones with higher energy code requirements, and is suitable for attic, crawlspace, and unconditioned space installations where thermal loss mitigation is a priority. The 18-inch diameter accommodates higher-volume supply or return branch runs typical in larger residential or small commercial systems.

Key Features

• UL 181, Class 1 Air Duct certified for code-compliant installations
• Tri-directional fiberglass scrim reinforced metallized polyester outer jacket for durability and puncture resistance
• Air-tight inner core rated for low-to-medium operating pressures
• R-8 insulation value meets energy code requirements in higher-demand climate zones
• 18-inch diameter x 25-foot length format ready for field cutting and connection

Compatibility

Designed as an OEM-style flexible duct solution for use in residential and light commercial forced-air HVAC distribution systems requiring UL 181 Class 1 compliant branch duct runs.

Installation Notes

Installation should be performed by a licensed HVAC technician or mechanical contractor in accordance with SMACNA guidelines and applicable local mechanical codes. Power down and lock out the air handling unit before making duct connections. Secure each end of the flex duct with approved sheet metal screws and listed duct tape or mastic sealant per UL 181B requirements. Avoid sharp bends, compression, or sagging runs that restrict airflow and reduce system efficiency.

Technical Specifications

• Diameter: 18 inches
• Length: 25 feet
• Insulation R-Value: R-8
• Outer Jacket: Metallized polyester with tri-directional fiberglass scrim reinforcement
• Certification: UL 181, Class 1 Air Duct
• Operating Pressure Range: Low to medium
• Color: Silver

Standard Information

• Brand: ATCO
• Manufacturer Part Number: 13102418