Thermaflex 55806000001 Flexible Air Duct 6in X 25ft R-6

Product Description

The THERMAFLEX 55806000001 is a Class I, R-6 insulated acoustical flexible air duct rated for medium-pressure heating and cooling HVAC systems. Constructed with a fiberglass insulation wrap over a steel wire inner core, this duct measures 6 inches in inner diameter and comes in a 25-foot length. It handles a temperature range of -20 to 250 degrees F, making it suitable for year-round supply and return applications. Licensed HVAC technicians install this duct in both new construction and retrofit projects where rigid fabricated ductwork is impractical or cost-prohibitive.

This flexible duct is suited for residential and light commercial air distribution systems. It works in supply or return sections including branch ducts, duct connections, and transitions between mixing units, diffusion devices, induction units, and control or terminal units. It is particularly useful for routing around structural obstacles or correcting misalignment between system components. It is also a practical choice for system extensions and reconfiguring conditioned zones in retrofit applications.

Key Features

• Class I rated flexible duct suitable for medium-pressure HVAC systems
• R-6 insulation value reduces thermal loss in supply and return runs
• 6-inch inner diameter by 25-foot length supports common branch duct sizing
• Fiberglass and steel wire construction provides corrosion resistance and shape retention
• Temperature rated from -20 to 250 degrees F for heating and cooling use
• Made in America

Compatibility

Designed as an OEM-style flexible duct replacement or new-installation component for medium-pressure residential and light commercial HVAC air distribution systems requiring a 6-inch diameter insulated flexible duct.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA guidelines and applicable local mechanical codes. Disconnect and lock out power to the air handling unit before beginning duct work. Avoid sharp bends that reduce the inner diameter and restrict airflow; maintain the manufacturer-recommended bend radius throughout the run. Secure all connections with approved clamps and mastic or metal tape rated for flexible duct applications.

Technical Specifications

• Inner Diameter: 6 inches
• Length: 25 feet
• Insulation Rating: R-6
• Class: Class I
• Temperature Range: -20 to 250 degrees F
• Material: Fiberglass, Steel Wire
• Color: Silver
• Style: Insulated
• Weight: 10.7 pounds
• Country of Origin: USA

Standard Information

• Brand: THERMAFLEX
• Manufacturer Part Number: 55806000001