▶ Additional information
Diameter (inches) : 2″-25″
Insulated Wrap : Fiberglass (Glass Wool)
Packing : 5/6/7.5/10meters Length in one carton box
▶ Basic Information
▶ Contact Information
Email: sales04@ducting.cn
Whatsapp: +86 13918360649
Insulated Aluminum Flexible Ducting With Fiberglass And PET
Description
Fiberglass Pre-Insulated Flexible Duct with PET and Aluminum
The R4.2 Insulated Aluminum Flexible Ducting With Fiberglass is designed for efficient air distribution
in HVAC supply and return systems. It combines a PET (polyethylene terephthalate) inner duct,
25–30 mm fiberglass insulation, and a single-layer aluminum foil outer jacket, providing superior flexibility,
energy efficiency, and mechanical durability.
This pre-insulated flexible duct ensures stable airflow, excellent thermal resistance, and long service life
for both commercial and residential HVAC applications.
- Inner Core: PET (Polyethylene Terephthalate) film, spirally reinforced with high-elasticity carbon steel wire.
- Insulation Layer: 25–30 mm thick fiberglass (glass wool) with optional densities from 12–32 kg/m³.
- Outer Jacket: Single-layer aluminum foil with high reflectivity and corrosion resistance.
This multi-layer structure provides optimal thermal insulation performance (R4.2 rating) and prevents condensation, air leakage, and heat loss across duct systems
.
Why PET Material For Flexible Ducts?
The PET flexible duct is constructed from polyethylene terephthalate (PET) film, spirally wrapped around a high-elasticity carbon steel wire, forming a lightweight yet durable structure with excellent flexibility and thermal performance.
Beyond its structural advantages, PET offers several key engineering benefits for HVAC applications:
- Non-toxic and heat-stable: PET remains stable under high temperatures and does not emit harmful gases during fire or overheating.
- Hygienic and clean: The smooth, non-porous inner surface prevents dust accumulation and microbial growth, ensuring clean air delivery.
- Low airflow resistance: The duct’s stable and smooth interior minimizes turbulence and pressure drop, improving overall system efficiency.
- Self-supporting: Once extended, the duct retains its shape without sagging—ideal for long or suspended runs.
- Easy installation: Lightweight, flexible, and easy to cut, suitable for confined spaces and modular layouts.
- High mechanical strength: PET provides up to 3–5 times the impact resistance of traditional duct liners.
- Superior barrier properties: Its low gas and moisture permeability prevents air leakage, condensation, and odor diffusion.
- Wide system compatibility: Suitable for high-, medium-, and low-pressure HVAC applications, including supply, return, and exhaust ducts.
Technical Specifications
| Item | Specification |
|---|---|
| Outer Sleeve | PET (Polyethylene Terephthalate) Film |
| Insulation Material | Fiberglass (Glass Wool) ,Thickness: 25mm / 30mm |
| Inner Duct | Single-layer Aluminum Foil |
| Fiberglass Density | 12kg/m3,16kg/m3,20kg/m3,24kg/m3,32kg/m3 |
| Polyester (option) | Thickness: 25mm / 30mm. Density: 100–750 g/m³ |
| Thermal Resistance | R4.2, R6, R8 (optional insulation thickness, high R-value colors is pink) |
| Maximum Air Velocity | 30 m/s |
| Working Pressure | Up to 3000 Pa |
| Available Diameter | 10″ (254mm), other sizes from 2″–25″ |
| Temperature Range | -30°C to +150°C |
| Steel Wire Diameter | 0.6–2.5 mm (carbon steel spiral) |
| Standard Length | 10 m (customizable upon request) |
| Ease of Cutting | No special tools required; easy to connect |
| Fire & Pressure Testing | Passed fire resistance and pressure tests |
| Flexibility | Can be bent in any direction (small bending radius) |
| Space Saving | Compression ratio of 10:1 |
| Installation | Easy installation; long service life |
Installation & Compatibility
The 8″ insulated flexible duct is engineered for easy integration into both new and retrofit systems. It bends effortlessly around beams and fittings, and its steel wire reinforcement keeps the duct stable in shape. With a compression ratio of 10:1, it saves space during shipping and warehousing.
No special tools are needed—just cut to size and connect with clamps. Compatible with standard HVAC ductwork components, including diffusers, registers, and grilles.
Why Choose This Pre-insulated Flexible Duct
- Certified R4.2 insulation for reliable energy savings
- Clean, fiber-free PET interior for hygienic air handling
- Aluminum foil outer layer enhances fire safety and durability
- Easy installation, transport, and maintenance
- Custom diameters and lengths available upon request
- For pricing, custom specifications, or detailed technical documents, contact our team. We’ll help you select the right fiberglass insulated flexible ducting for your HVAC project.
