Thanks to its excellent products and quality services, UNT Duct is one of the leading pu pre-insulated aluminium ducting 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 Pre-Insulated Aluminium Ducting
PU Pre‑Insulated Aluminium Ducting adopts PU foam core with double‑side aluminium foil facings. It features low thermal conductivity, lightweight, easy on‑site fabrication, good air‑tightness, widely used for HVAC ventilation and air‑conditioning duct systems.
Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 4000*1200*20mm
Foam Density: 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)
Structural composition and forming logic of PU Pre-Insulated Aluminium Ducting
The core of the product is the rigid PU closed-cell foam core layer, and the aluminum foil on both sides is thermally pressed and bonded. The aluminum foil not only serves as the inner and outer protective layer of the duct but also acts as an air barrier, preventing water vapor from penetrating into the foam. Traditional iron sheet ducts have an iron sheet shell and are wrapped with insulation cotton. There are often gaps and delamination between the insulation cotton and the iron sheet. However, this product is a fully thermally bonded one, with the foam and aluminum foil firmly adhered together, and there are no layer separation gaps. The panel is cut using special tools, and 45-degree slanted cutting is used for splicing, followed by the use of special strips and aluminum foil adhesive to seal the seams. It is directly assembled into square or rectangular ducts without the need for iron sheet rolling equipment, eliminating a large number of auxiliary materials such as flanges and angle irons. The closed-cell structure is crucial. The micro pores inside the foam do not connect, making it difficult for water vapor to penetrate, thereby reducing the risk of the insulation layer getting damp and failing from the root.
Thermal performance and energy consumption value of PU Pre-Insulated Aluminium Ducting
The PU material itself has a low thermal conductivity and excellent insulation effect under stable conditions. When the duct is operating with a cooling air conditioning system, there is a temperature difference between the low-temperature air inside the duct and the external hot air. If the insulation fails, condensation and dripping water will form on the outer wall of the duct. The integrated structure reduces the air layer and reduces heat loss.
In many projects, the traditional iron sheet duct insulation construction is affected by the workers' skills, resulting in insulation joint gaps, and heat loss through these gaps, causing the air conditioning main unit load to increase. This pre-insulated sheet material has a continuous and complete insulation layer. As long as the joint sealing is in place, the overall thermal performance is stable, and the energy consumption of the air conditioning system can be reduced during long-term operation. It should be noted that long-term high-temperature conditions will accelerate the aging of PU foam, and it is more suitable for conventional air conditioning and ventilation, but not for long-term ultra-high temperature smoke exhaust conditions.
Life cycle cost consideration of PU Pre-Insulated Aluminium Ducting
Compared with the ordinary iron sheet plus external insulation, the unit purchase price of the sheet material will be higher. However, when calculated comprehensively: eliminating the flanges, angle iron, and auxiliary materials such as insulation cotton, reducing on-site labor hours, compressing the transportation volume, the overall project cost may not be higher.
The product's lifespan is highly dependent on the installation quality. As long as the sealing is intact and the aluminum foil surface layer is complete, it can maintain stable operation for many years. If the installation stage is damaged and not repaired, there will be local condensation and insulation attenuation, and the maintenance and renovation difficulty is greater than that of iron sheet ducts. When selecting a project, it is necessary to comprehensively evaluate the project conditions, fire requirements, and construction conditions, and not blindly replace with metal ducts.
Why choose UNTDuct
Project Case of UNTDuct
PRE-INSULATED DUCT vs G.I. DUCTWORK
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| 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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