R6 / R8 Insulated Flex Duct
High-performance insulated flexible ducts rated R6 (40mm) and R8 (80mm). Designed for energy code compliance in attics, crawl spaces, and unconditioned areas where maximum thermal performance is required.
- R6 (40mm) and R8 (80mm) options
- Exceeds IECC energy code requirements
- Maximum thermal performance
- Ideal for attics and crawl spaces
- Heavy-duty vapor barrier
- Condensation-free operation
Technical Specifications
| Inner Duct | Aluminum foil + steel wire helix |
| Insulation | Fiberglass wool, 16 kg/m³ |
| R6 Thickness | 40mm (1.6") |
| R8 Thickness | 80mm (3.1") |
| Outer Jacket | Heavy-duty metalized polyester |
| Diameter Range | 4" – 20" (100mm – 500mm) |
| Temperature Range | -20°C to +120°C (-4°F to +248°F) |
| Standard Length | 25 ft (7.6m) |
More Insulated Ducts
Fiberglass Insulated Flex Duct
Standard fiberglass wool insulated flexible duct with aluminum foil inner core and metalized polyester vapor barrier. 25mm (1") fiberglass insulation at 16 kg/m³ density. Industry standard for residential HVAC.
Polyester Insulated Flex Duct
Polyester wool insulated flexible duct — a fiberglass-free alternative. Non-irritant polyester insulation at 200 g/m² density. Ideal for environments where fiberglass particles are a concern.
Soundproof Insulated Duct
Acoustically lined insulated flexible duct with non-woven fabric inner core for superior noise reduction. Reduces HVAC system noise by up to 25 dB. Perfect for bedrooms, offices, and recording studios.
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Need a Custom Version?
We can modify sizes, materials, and packaging to match your exact specifications. OEM and private label available.