Atco Rubber Products FD-6X25-R6FB Flex Duct 6in X 25ft R-6

Product Description

The ATCO RUBBER PRODUCTS FD-6X25-R6FB is a 6-inch diameter, 25-foot flexible air duct with R-6 insulation, designed for low-to-medium operating pressure HVAC applications in residential and light commercial systems. The outer jacket is constructed from a tri-directional fiberglass scrim reinforced metallized polyester film, providing durability and vapor resistance. The inner core is air-tight for efficient airflow with minimal leakage. This flex duct carries UL 181 Class 1 Air Duct certification, making it suitable for supply and return branch runs in forced-air systems. HVAC installers and sheet metal technicians are the typical trade professionals handling this product.

This flex duct is suited for residential and light commercial forced-air HVAC installations where insulated flexible duct is required for branch runs, transitions, or connections between rigid ductwork and diffusers or grilles. The R-6 insulation rating meets common energy code minimums for unconditioned space installations such as attics and crawlspaces. Its 25-foot length provides enough material for multiple branch connections from a single roll, reducing waste on larger jobs.

Key Features

• UL 181 Class 1 Air Duct certified for use in low-to-medium pressure HVAC systems
• R-6 insulation value meets common energy code requirements for unconditioned spaces
• Tri-directional fiberglass scrim reinforced metallized polyester outer jacket for durability and vapor control
• Air-tight inner core designed to minimize air leakage in pressurized duct systems
• 6-inch diameter, 25-foot length suitable for standard residential branch duct runs

Compatibility

Designed as an OEM-style flexible duct solution for residential and light commercial forced-air HVAC supply and return branch applications requiring UL 181 Class 1 rated insulated flex duct.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA guidelines and applicable local mechanical codes. Power down the air handler and shut off the system before disconnecting or connecting duct sections. Secure both ends of the flex duct with approved strapping and UL 181B-listed mastic or metal tape — standard duct tape is not approved for UL 181 systems. Support the duct at proper intervals to avoid sags that restrict airflow and reduce system efficiency.

Technical Specifications

• Diameter: 6 inches
• Length: 25 feet
• Insulation Rating: R-6
• Outer Jacket: Tri-directional fiberglass scrim reinforced metallized polyester
• UL Certification: UL 181 Class 1 Air Duct
• Package Dimensions: 27 inches x 10 inches x 10 inches
• Weight: 11.64 pounds

Standard Information

• Brand: ATCO RUBBER PRODUCTS
• Manufacturer Part Number: FD-6X25-R6FB