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Pre-insulated Aluminum PU Duct

Pre-insulated Aluminum PU Duct is a high-performance, all-in-one air distribution solution for HVAC and central air conditioning systems. It is widely used in modern commercial, residential, industrial and cleanroom projects for its superior insulation, airtightness and durability.It eliminates the need for separate insulation layers, streamlining construction while cutting energy waste and ensuring durability.

Core Structure & Composition

This duct system features a sandwich panel design:

Inner Core: Closed-cell rigid polyurethane foam (density typically 42-45 kg/m³)

Facing Layers:

Internal: 60 micron embossed aluminum foil

External: 60-200 micron aluminum sheet or aluminum foil

Standard Sizes: L 3950mm × W 1200mm × T 20mm

Key Technical Specifications of Pre-insulated Aluminum PU Duct

Parameter	Value	Significance
Thermal Conductivity	0.020 W/m·K	Exceptional insulation, minimizing heat transfer
R-Value (20mm)	1.003 m²·K/W	High thermal resistance for energy efficiency
Compressive Strength	202 kPa (10% strain)	Rigid enough for handling and installation
Water Absorption	≤0.36-1.9%	Prevents condensation and mold growth
Fire Rating	B2 (EN 13501-1)	Low flammability, low toxic smoke emission
Weight	1.3- kg/m²	Significantly lighter than traditional metal ducts
Service Life	20+ years	Long-term reliability with minimal maintenance

Main Advantages of Pre-insulated Aluminum PU Duct

High energy efficiency: Excellent thermal insulation reduces HVAC energy consumption by 20–30%.

Lightweight & fast installation: Much lighter than traditional steel ducts; no on-site insulation wrapping needed, saving 40–60% installation time.

Moisture & condensation proof: Near-zero water absorption prevents condensation, mold and performance degradation.

Hygienic & cleanroom compatible: Smooth aluminum surface resists dust, bacteria and mold, easy to clean, ideal for hospitals, food factories and cleanrooms.

Stable & durable: High toughness, no cracking or powdering; aluminum foil and PU foam stay bonded without delamination.

Sound damping: PU core absorbs airflow noise for quieter indoor environment.

Comparison with Traditional G.I. Ductwork

Feature	Pre-insulated Aluminum PU Duct	Traditional Galvanized Steel Duct
Weight	1.3-1.4 kg/m² (70% lighter)	8-10 kg/m² (heavier, requires more structural support)
Installation Time	50% faster (pre-insulated, no separate insulation)	Longer (duct + insulation + vapor barrier)
Energy Efficiency	20-30% better (low thermal conductivity)	Lower (high heat transfer without insulation)
Air Leakage	≤2% (airtight design)	10-20% (typical for uninsulated metal ducts)
Maintenance	Minimal (20+ year lifespan)	Higher (corrosion, insulation degradation)
Total Cost	Lower (material + labor + energy savings)	Higher (multiple components + installation + energy costs)