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PIR HVAC Duct Board

PIR HVAC duct board is a rigid thermal insulation panel made from polyisocyanurate (PIR) foam, designed specifically for heating, ventilation, and air conditioning (HVAC) ductwork. It is valued for its high thermal efficiency, light weight, and good fire performance.

Structure: Silver Aluminum/ PIR Foam/ Silver Aluminum
Standard Size: 3950*1200*20mm
PIR Foam Density: 50kg/m³
Aluminum Thickness: 0.06mm or 0.08mm
Packing: 10 sheets/ package
Thermal Conductivity: 0.022w/m.k

Fire Rating: Class 0 (BS 476 Part 6&7)

Closed Cell Content: ≥90% (contributes to low moisture absorption and high insulation performance)

Environmental: Manufactured with CFC/HCFC-free blowing agents (Zero ODP - Ozone Depletion Potential)

Why choose PIR HVAC Duct Board over G.I. Duct?

Choosing between PIR (Polyisocyanurate) pre-insulated duct boards and traditional Galvanized Iron (G.I.) ducts is a fundamental decision in HVAC design. While G.I. ducts have been the industry standard for years, PIR duct boards offer several significant advantages.

The table below summarizes the key differences based on a comparison of 20mm PIR board versus 0.5mm G.I. duct with 30mm rubber insulation.

Feature	PIR Pre-Insulated Duct Board	Traditional G.I. Duct with Insulation
Thermal Efficiency	Excellent. Thermal conductivity (k-value) is 0.022 W/m·K. The integrated insulation minimizes energy loss .	Poor. Thermal conductivity is 0.035 W/m·K. Metal acts as a thermal bridge, causing 20-30% higher energy loss.
Weight & Structure	Lightweight. Weighs 1.4-2.0 kg/m², which reduces building structural load and simplifies handling.	Heavy. Weighs 5.1-6.3 kg/m² (including insulation), requiring heavy supports and more labor for installation.
Installation Speed	Fast & Simple. A single-step process. Factory-made panels are cut and assembled on-site, saving 40-60% in labor time.	Complex & Slow. A two-step process: fabricate the metal duct, then wrap it with insulation material, which is labor-intensive and prone to gaps.
Air Leakage	Low. Airtight construction with air leakage as low as ≤2%, ensuring efficient system performance	High. Leakage can be 5-10% due to multiple joints and on-site sealing requirements.
Hygiene & IAQ	Excellent. Smooth, non-porous aluminum interior resists dust, mold, and moisture, making it ideal for cleanrooms and hospitals.	Poor. Porous insulation can trap dust and promote microbial growth. The metal itself can corrode in humid conditions.
Noise Reduction	Good. The PIR foam core absorbs vibration and reduces operational noise by 10-15 dB.	Fair. Metal conducts sound, often requiring additional silencers to reduce noise.
Space Savings	Excellent. All-in-one 20mm thickness is ideal for fitting in tight ceiling spaces.	Poor. The 30mm+ total thickness is bulky and requires more space for installation.
Lifecycle Cost	Lower. 20-30% lower HVAC energy consumption and less maintenance lead to significant long-term savings.	Higher. Cheaper initial material cost is offset by higher energy bills and ongoing maintenance (e.g., corrosion checks)