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PIR ALU Duct Board

PIR ALU Duct Board is a high-performance, all-in-one pre-insulated HVAC duct panel designed as a modern, efficient alternative to traditional galvanized sheet metal ductwork. It consists of a rigid, closed‑cell Polyisocyanurate (PIR) foam core permanently bonded to double‑sided aluminum foil facings, integrating duct structure, thermal insulation, air barrier and vapor barrier into one single panel. This factory-engineered system delivers superior energy efficiency, faster installation, better air quality and longer service life for modern HVAC air distribution systems.

Key Specifications

Core Material: Rigid closed-cell Polyisocyanurate (PIR) foam

Core Density: 53 kg/m³

Standard Thickness: 20 mm

Thermal Conductivity: λ = 0.022 W/m·K

Facings: Double‑sided aluminum foil, 0.08 mm per side

Edge System: Precision-machined tongue-and-groove (T&G)

Fire Performance: Self‑extinguishing, low smoke, compliant with international standards

Environmental Feature: CFC/HCFC‑free, ozone‑safe blowing agent

Comparative Advantages of PIR ALU Duct Board vs. XPS Pre-insulated Duct

PIR ALU Duct Board (20mm, double 0.08mm aluminum foil, λ=0.022 W/m·K, 53 kg/m³) and XPS Pre-insulated Duct are both pre-insulated HVAC solutions, but PIR ALU Duct Board has obvious advantages in key performances. Below is a simplified comparison focusing on its core strengths:

1. Superior Thermal Insulation & Energy Efficiency

PIR ALU Duct Board has a thermal conductivity of 0.022 W/m·K, much lower than XPS (0.030–0.035 W/m·K). It reduces HVAC energy consumption by 20–30% and maintains stable insulation performance for a long time, while XPS's thermal efficiency will slightly decrease with aging.

2. Higher Structural Rigidity & Anti-Sagging Performance

With a 53 kg/m³ high-density PIR core, PIR ALU Duct Board is rigid and stable, supporting long-span installation without frequent bracing. XPS ducts (30–40 kg/m³ core density) are brittle, easy to crack or sag, requiring more construction support.

3. Better Fire Safety

PIR ALU Duct Board has self-extinguishing properties, low smoke emission, and meets international fire standards (Class 0/BS 476, etc.). XPS foam is inherently flammable, releases more toxic smoke when burned, and is not suitable for high-fire-safety projects.

4. Superior Hygiene

PIR ALU Duct Board's double-sided 0.08mm aluminum foil is smooth, non-porous, and easy to disinfect, meeting hygiene standards for hospitals and cleanrooms. XPS ducts usually use porous non-metallic facings, which are easy to trap dust and mold.

5. Better Airtightness & Vapor Barrier

PIR ALU Duct Board's tongue-and-groove joints achieve air leakage ≤2%, and its aluminum foil acts as an integral vapor barrier. XPS ducts have simpler joints with higher air leakage (5–8%) and rely on additional layers for vapor barrier.

6. Longer Service Life & Lower Maintenance

PIR ALU Duct Board has a service life of 20–30 years, with moisture-proof and corrosion-resistant properties, requiring almost no maintenance. XPS ducts only last 10–15 years, needing regular repair or replacement.

7. More Eco-Friendly

PIR ALU Duct Board uses CFC/HCFC-free blowing agents, and its aluminum foil is recyclable. XPS uses high-GWP blowing agents, is hard to recycle, and causes more environmental pollution.

8. Easier Installation & Better Adaptability

PIR ALU Duct Board is lightweight (2–3 kg/m²), easy to install, and shortens construction time by 40–60%. Its 20mm thin design saves space. XPS ducts are heavier and thicker, harder to install and customize.

Summary of Core Advantages

Compared with XPS Pre-insulated Duct, PIR ALU Duct Board is better in all key performances. Although its upfront cost is slightly higher, the savings in energy, labor and maintenance can recover the investment within 3–5 years, making it a more reliable choice for modern HVAC projects.