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PU Foam Air Duct
Polyurethane (PU) Foam Pre-Insulated HVAC Ductwork Panel is a high-performance, all-in-one solution designed for modern heating, ventilation, and air conditioning (HVAC) systems. Built with a precision-engineered sandwich structure, it features a dense polyurethane (PU) foam core-celebrated for its exceptional thermal insulation properties-sandwiched between two protective layers of corrosion-resistant aluminum foil. This factory-prefabricated panel merges insulation, structural strength, and airtightness into a single component, eliminating the need for separate insulation installation and streamlining ductwork setup in diverse buildings.
Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 4000*1200*20mm
Foam Density: 40-45kg/m3
Aluminum Thickness: 0.06mm or 0.08mm
Aluminum Color: Silver
Packing: 10 sheets/ package
Loading Capacity: 710 sheets/ 40'HQ (packed with plastic bags)
660 sheets/ 40'HQ (packed with cardboard box)
certification of PU Foam Air Duct
Fire Safety, Thermal Conductivity and Physical Performance
BS 476 Part 6&7
ASNZS 1530.3
thermal Conductivity
Compress Strength
CFC HCFC Free
Structure and Material Analysis of PU Foam Air Duct
Composite Sandwich Structure
The inner and outer layers are aluminum foil/aluminum plate protective layers, while the middle layer is high-density closed-cell PU foam core material. The structure is stable and highly integrated. The metal surface layer provides strength, moisture-proofing, and fire resistance as the foundation, while the foam layer is responsible for insulation and heat preservation, jointly enhancing the service life and stability.
Core Material Characteristics
The thermal conductivity of PU foam is as low as 0.018–0.022 W/(m·K), with a high closed-cell rate, low water absorption rate, and is not prone to mold or bacterial growth. It is suitable for clean environments. The sheet density is moderate, balancing compression resistance and lightweight, facilitating transportation and installation.
Standardization and Adaptability
Common thicknesses are 10/20/25/30/40mm. It can be cut, bent, and spliced on-site, adapting to complex architectural layouts, reducing the number of irregular parts and joints, and improving system sealing.
Performance Advantages of PU Foam Air Duct
1. Energy saving and insulation
Integrated insulation design eliminates the need for additional insulation layers. The cold / hot loss is reduced by 15% - 25% compared to traditional ducts, significantly lowering the energy consumption and electricity costs of the air conditioning system over the long term.
2. Lightweight and high strength
The unit weight is only 1/3 - 1/4 of that of iron sheet ducts, reducing the building load, lowering the installation difficulty and labor costs, while also having good resistance to compression and deformation.
3. Sealing and air resistance
The inner wall is smooth, with low air resistance and low noise; the joint sealing is reliable, and the system leakage rate can be controlled within 3%, far superior to traditional ducts, improving ventilation efficiency.
4. Waterproof and corrosion resistance
The closed-cell structure blocks water vapor penetration, preventing condensation and mold growth in high-humidity environments, eliminating rusting problems, and having a longer lifespan than iron sheet ducts, with lower maintenance costs.
5. Fire safety
It can reach B1 level of flame retardancy, and when combined with a metal surface layer, it meets the mainstream building fire protection requirements, suitable for densely populated and high-security areas.
Installation and Cost of PU Foam Air Duct
1. Installation Efficiency
The system can be formed by on-site cutting, connection, and sealing. It has fewer processes and a faster construction speed. The construction period is shortened by 30% - 50% compared to traditional ducts, making it suitable for rush projects.
2. Overall Cost
The material unit price is slightly higher, but it eliminates the need for insulation layers, auxiliary materials, and a large number of workers. The installation and transportation costs are lower, and the overall cost over the entire life cycle has a more favorable advantage.
3. Maintenance Cost
It does not rust, does not condense moisture, and is not easily damaged. There is almost no post-maintenance work, and the long-term use has outstanding cost performance.
Market and Trend of PU Foam Air Duct
Replacing Traditional Air Ducts
Driven by green buildings, energy-saving renovations, and the dual-carbon policy, it has rapidly replaced galvanized iron sheet air ducts and phenolic air ducts, becoming the mainstream choice.
Industry Standards Improvement
Compliant with national standards and international HVAC regulations, with a mature testing system, controllable quality, and high export and engineering recognition.
Development Direction
Upgrading towards higher fire resistance levels, higher pressure resistance, lower thermal conductivity, and prefabricated standardization, to adapt to more demanding scenarios.
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