Name: PUR Air Conditioning Duct Panel Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 311803887

Thanks to its excellent products and quality services, UNT Duct is one of the leading pur air conditioning duct panel 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.

PUR Air Conditioning Duct Panel

Manufactured with high-performance PU foam as the core material, PU pre-insulated duct panels are lightweight composite products. They integrate excellent thermal insulation, structural rigidity and certified fire resistance into one integrated unit, and are widely used in various HVAC construction projects.

This modular all-in-one duct system effectively cuts down energy loss of the whole system, speeds up on-site installation, and maintains consistent ventilation performance throughout long-term service.

This pre-insulated duct features a three-layer sandwich panel structure:

Aluminum Facings

Inner and outer sides are lined with aluminum foil or sheet for smooth, hygienic and anti-corrosion performance. Standard indoor foil thickness is 60–80 microns; thicker aluminum sheets or extra coatings are available for outdoor and heavy-duty scenarios.

Rigid PU Foam Core

The central rigid polyurethane foam delivers superior thermal insulation. Its closed-cell structure endows the duct with waterproof capability and reliable sound insulation.

Ozone-Safe PU Foam

No CFCs or HCFCs are used during foam production, eliminating damage to the ozone layer.

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Environment and Service Life of PUR Air Conditioning Duct Panel

A. Environmental protection performance

Fluorine-free (CFC/ HCFC-free), formaldehyde-free, and free benzene-free, the all-water foaming technology complies with the EU RoHS directive.

Recyclability: PIR foam and metal surface layer can be separated and recycled, reducing waste.

B. Service life

Under normal usage conditions, the service life is ≥20 years, and the surface coating can be extended to more than 25 years. For instance, the anti-corrosion coating on the surface of aluminum foil can resist the erosion of acid rain and industrial waste gas.

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Key Performance and Technical Advantages of PUR Air Conditioning Duct Panel

Thermal insulation and energy conservation:

The thermal conductivity is as low as 0.02W/(m · k), which is only half that of EPS material. Combined with the cold bridge interface design, it meets the building energy conservation requirements of over 65%.

Safety and fire prevention:

After adding flame retardants to the core material, it meets the B1 grade difficult-to-burn standard. Some products can be upgraded to A2 grade. No toxic gases are released during combustion, and the softening point exceeds 250℃.

Lightweight and high strength:

The density of the board is 1.5-2.0g/cm³. The weight of a 4mm thick board is only 5.5-7.5kg per square meter. The peel strength is ≥7N/mm, and the wind pressure resistance performance is ≥ 1.5kpa

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Why choose UNTDuct

UNT Pre-insulated Ductwork

Project Case of UNTDuct

Project Case

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.

How To Make PU Pre-insulated Straight Duct

Step 1 - Tracing: outline the duct shapes on the panel.

Step 2 - Cutting: Using manual cutting tools, cut along the panel edges and create 90 degree "V" grooves on the panel.

Step 3 - Gluing: Apply glue to the cutting surfaces of the panels.

Step 4 - Folding: After the glue is cured, fold the sides toward each other to form the straight duct.

Step 5 - Taping: The tape is applied only to the external seams of the duct where the sides of the panel were joined for air-tightness.

Step 6 - Flanging: After applying glue and positioning the steel angle bracket, process to fit the PVC or aluminum invisible flanges.

Step 7 - Reinforcement: reinforce the duct with an aluminum reinforcement bar and G.I. Shaped disks, if necessary.

Step 8 - Sealing: After the duct is assembled, seal all internal joints hermetically with silicone.

Need the complete fabrication solution?
UNT Duct supplies PU duct panels, fabrication tools, jointing accessories, reinforcement components and related materials for complete pre-insulated duct fabrication.

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