Brief introduciton of PU Pre-insulated Aluminum Duct

PU Pre-insulated Aluminum Duct

has a sandwich structure: a closed-cell PU foam core (thermal conductivity ~0.020 W/m·K) with aluminum layers on both sides. Lightweight (70% lighter than galvanized ducts), it installs fast, leaks little (<2%), resists corrosion/mold, and cuts energy use by 15-20%. It lasts 20+ years, ideal for commercial/residential HVAC.

Panel Structure: Aluminum Foil / PU Foam / Aluminum Foil
Aluminum Color: Silver/ Silver Or Silver/Black
Foam Density: 50KGS/CBM
Panel Dimension: 3950mm*1200mm*20mm
Aluminum Thickness: 0.06 (Embossed)
Packing: 10sheets/ Package

Core Structure: Scientific Design of Three-Layer Composite

The performance advantages of PU Pre-insulated Aluminum Duct stem from its unique three-layer composite structure, where each layer works synergistically to maximize functionality:

Inner Layer: Aluminum Foil / Aluminum Plate Substrate
In direct contact with the air flow, it is made of high-purity aluminum foil or thin aluminum plate with a smooth and flat surface. The core function of this layer is to reduce air flow resistance. Meanwhile, utilizing the inert nature of aluminum, it prevents moisture and impurities in the air flow from corroding the pipeline, ensuring the interior of the air duct remains clean.

Middle Layer: Polyurethane (PU) Foam Insulation Layer
This is the "core insulation barrier" of the air duct. Polyurethane foam is mainly composed of a closed-cell structure with an extremely low thermal conductivity (usually ≤0.024W/(m・K)), which is much lower than that of traditional insulation materials (such as glass wool with 0.04W/(m・K)). It can minimize the energy loss of cold and hot air inside the pipeline. In addition, the closed-cell structure also endows it with certain sound absorption capacity, which can reduce the noise generated by air turbulence and improve the quietness of the system operation.

Outer Layer: Reinforced Aluminum Protective Surface
The outer layer mostly uses thickened aluminum foil or embossed aluminum plate. It can not only reflect external heat (reducing environmental heat intrusion in summer and internal heat leakage in winter) but also resist mechanical impacts during construction, installation, or daily use. This protects the internal PU insulation layer from damage and enhances the overall deformation resistance of the air duct.

Performance Highlights: Why It's Preferred for HVAC Systems?

Superior Energy Efficiency
With the PU layer's high insulation, cold/hot loss is under 5% (vs. 15%-20% for traditional ducts), slashing equipment load and long-term energy costs.

Easy Installation, Faster Schedules
Pre-integrated insulation and protection layers eliminate on-site insulation work. Weighing 1/3 of galvanized ducts, it cuts installation time by 30%-50%.

Excellent Air Tightness & Moisture Resistance
Special joints with seals ensure air leakage ≤2%. Aluminum and closed-cell PU resist condensation, ideal for humid areas (basements, swimming pools, etc.).

Durable, Low Maintenance
15-20 year lifespan (vs. 8-12 years for traditional ducts) due to corrosion-resistant aluminum and stable PU. No regular insulation replacement, near-zero maintenance costs.

Controllable Fire Safety
Flame-retardant PU meets B1 class (oxygen index ≥30), burning slowly with low smoke, satisfying most building fire codes.

Polyurethane (PU) Foam Pre-Insulated HVAC Ductwork Panel

Comparison with Traditional Ducts

Performance Indicators	PU Pre-insulated Aluminum Duct	Traditional Galvanized Iron Duct (with external insulation)
Insulation Effect	Excellent (thermal conductivity ≤0.024W/(m・K))	Average (thermal conductivity ≥0.04W/(m・K))
Installation Period	Short (integrated construction)	Long (step-by-step construction of duct + insulation)
System Air Leakage Rate	≤2%	5%-10%
Unit Weight (kg/m²)	3-5	8-12
Service Life (years)	15-20	8-12