Name: PU Foam Ducting Panel Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 305400494

Thanks to its excellent products and quality services, UNT Duct is one of the leading pu foam ducting 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.

PU Foam Ducting Panel

PU Foam Ducting Panel adopts closed-cell PU core with double aluminum foil, λ≤0.022W/m·K, B1 flame retardant, lightweight & airtight. Integrated insulation shortens construction, cuts HVAC energy loss 25%-40%, widely used in commercial & industrial HVAC systems.

Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 4000*1200*20mm
Foam Density: 40-45kg/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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How to make PU Foam Straight Ducting

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 from 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.

1. marking

2. Cutting

3. Applying Glue

4. Folding

5. taping

6. Applying Profiles

7. Applying Silicone Sealant

8. Reinforcement

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Product structure and core physical parameters of PU Foam Ducting Panel

This product is a sandwich-type integrated composite sheet, with a hard polyurethane closed-cell foam core in the middle, double-sided hot-pressed composite 60–80μm embossed anti-corrosion aluminum foil on both sides. The standard specification is 3950×1200×20mm, and the custom thickness can be selected from 10–40mm.

Core measured data: Foam density 48–52kg/m³, closed-cell ratio ≥ 95%; Thermal conductivity 0.018–0.022W/(m・K); Absorption rate ≤ 1.5%; Water vapor permeability coefficient < 3ng/(Pa・m・s); Operating temperature range - 50℃~80℃; Fire performance reaches national standard GB8624 B1 level of flame retardant, smoke density SDR ≤ 35, no melting dripping during combustion, forming a carbonized flame-blocking layer to stop the spread of flames.
Compared with the traditional glass wool, the thermal conductivity of this product is 0.047W/(m・K). Under the same insulation effect, a 20mm PU board has the same insulation capacity as a 45mm mineral wool and 140mm softwood, significantly reducing the space occupied by the ceiling.

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Lightweight structure and construction efficiency of PU Foam Ducting Panel

The weight of the sheet material is only 1.2–1.5 kg per square meter. For the same size galvanized iron sheet duct, the weight is approximately 4.8 kg per square meter. It is only 1/3 of the traditional iron sheet duct, reducing the load on the building ceiling and saving the usage of hangers and fixed supports by over 30%. It also saves the cost of auxiliary steel structures.

During the construction process, there is no need for secondary outsourcing of insulation or separate soundproofing procedures. The sheet is cut in the factory, folded and connected on-site to form the duct. The assembly time for a single section of the duct is shortened by 70%, and the overall ventilation project duration is reduced to 1/5 of the original time compared to the iron sheet duct.

For a 1000 square meter ventilation duct system, the traditional solution requires 12 people to complete it in 7 days, while the PU prefabricated sheet only needs 6 people and 2 days to complete it. The indirect costs such as personnel management and site leasing are reduced by 10%–15%.

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Energy-saving and thermal insulation performance and operating cost data of PU Foam Ducting Panel

The integrated prefabricated structure has no cold bridges or joint leakage heat defects. The cold loss of the duct system is reduced by more than 85% compared to the galvanized iron sheet + external glass wool solution. The overall energy consumption of the central air conditioning system can be reduced by 25% - 40%.

Based on a calculation of a 1,000㎡ commercial complex: for 8 months of annual air conditioning operation, using PU duct panels can save about 16,000 yuan in electricity costs per year. The incremental material cost can be recovered within 2 - 3 years through energy savings;

in low-temperature and high-precision scenarios such as data centers and lithium battery drying rooms, where the dew point is ≤ -50℃, the panels do not absorb moisture for a long time and the thermal insulation performance degrades by less than 5% in 10 years, avoiding the equipment downtime losses caused by the failure of traditional insulation layers due to moisture absorption.

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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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