Name: PU Foam Pre-insulated Duct Board Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 305358744

Thanks to its excellent products and quality services, UNT Duct is one of the leading pu foam pre-insulated duct board manufacturers and suppliers in China. Welcome to buy the high quality and customized products from our factory. We will offer you the best service and fast delivery.

PU Foam Pre-insulated Duct board

PU Foam Pre-insulated Duct board, also referred to as PU aluminum foil duct board or PU sandwich air duct panel, is a high-performance composite material specially engineered for HVAC heating, ventilation and air conditioning ductwork systems.

The panel features a three-layer bonded composite structure:

Two outer faces: Heavy-duty aluminum foil, available in smooth or embossed finishes.

Central core: Rigid polyurethane (PU) foam, serving simultaneously as structural reinforcement and thermal insulation

Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 3950*1200*20mm
Foam Density: 45-50kg/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)

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Core Technical & Physical Properties of PU Foam Pre-insulated Duct board

Technical Parameters	Typical Value / Standard	Engineering Significance
Density (Core Foam)	45-55kg/m3	Balances lightweight design with excellent compressive structural strength.
Thermal Conductivity	≤0.022w/m.k	Extremely low. Outperforms traditional glass wool (~0.040), improving thermal insulation by nearly 40%.
Fire Rating	Class B1 (GB 8624)	Meets fire safety and flame retardant requirements for most commercial and residential buildings.
Closed Cell Ratio	≥95%	Effectively blocks water vapor penetration, preventing internal mold and performance degradation.
Working Temperature	-60℃--+80℃	Adapts to various harsh environments, from extreme cold to high-temperature air transmission.

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Environmental Friendliness of PU Foam Pre-insulated Duct board

Our PU Foam Pre-insulated Duct boards are manufactured from fully eco-friendly, green raw materials that comply with international environmental standards.

The finished product releases no toxic or hazardous volatile substances during installation and long-term usage, while featuring ultra-low formaldehyde levels far below global safety thresholds.

Free from irritating odors and harmful chemical emissions, the material delivers outstanding safety and superior indoor air quality for occupants.

It is perfectly applicable to indoor ventilation and air duct systems of all types of occupied spaces, including residential apartments, office complexes, shopping malls, schools, hospitals, hotels and other public and commercial buildings, creating a non-toxic, healthy living and working environment for everyone.

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Why choose UNTDuct

UNT Pre-insulated Ductwork

Project Case of UNT Ductwork

PRE-INSULATED DUCT vs G.I. DUCTWORK

Metric	20mm PU Pre - Insulated Duct (with 0.08mm Alu. Foil, )	0.5mm G.I Duct + 30mm Rubber Plastic (40-90kg/m³)
Fire Safety	Compliant (Class 0/BS 476, AS 1530.3). Self-extinguishing PU core, low toxic smoke, non-combustible alu foil.	G.I non-combustible; rubber plastic fire-retardant but requires coating to meet strict codes.G.I
Thermal Insulation	Excellent. λ=0.020 W/m·K, no thermal bridging. 20mm integrated structure ensures consistent insulation.	Fair. λ=0.035 W/m·K, thermal bridging at G.I joints. 30mm insulation offset by metal conductivity.
Hygiene & Air Quality	Superior. Non-porous alu foil, smooth inner surface, moisture-resistant PU. Meets cleanroom/hospital standards.	Poor. Porous rubber plastic traps dust/mold; G.I-insulation gaps breed pathogens.
Lightweight	1.4-1.5 kg/m². Ultra-light, reduces structural load; ideal for retrofits/timber-framed buildings.	5.1–6.3 kg/m². Heavy G.I base + bulk insulation; requires reinforced supports.
Energy Efficiency	Excellent. 20–30% lower HVAC energy consumption. Minimizes heat gain/loss in conditioned air.	Low. 20–30% higher energy loss due to inferior insulation and thermal bridging.
Ease of Construction	Easy. Factory-prefabricated tongue-and-groove joints. No separate insulation step; 40–60% less labor time.	Complex. Two-step on-site process: G.I duct fabrication + rubber plastic wrapping. Labor-intensive, prone to gaps.
Quiet Operation	Good. PU core absorbs 10–15 dB airflow noise; alu foil dampens vibration.	Fair. Rubber plastic provides basic sound reduction, but G.I vibration and insulation gaps reduce efficiency.
Space Savings	Excellent. 20mm total thickness (all-in-one). Fits tight ceilings/retrofit cavities.	Poor. 30.5mm total thickness (0.5mm G.I + 30mm insulation). Bulky, requires larger installation space.
Environmental Friendliness	Balanced. CFC/HCFC-free PU, recyclable alu foil. 20–30-year lifespan; net carbon positive in 1–3 years.	Low. Rubber plastic non-recyclable; 10–15-year lifespan. Frequent replacement increases waste; higher energy emissions.
Air Leakage	Superior. ≤2% air leakage (EN 1507, AS/NZS 3660.1). Airtight factory joints + alu foil vapor barrier.	Poor. 5–10% air leakage. On-site sealing gaps; separate vapor barrier required.

Performance comparison based on UNT Duct product data and standard system configurations. Actual performance may vary depending on system design, installation method and project conditions.

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