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Polyurethane (PU) Pre-Insulated Ducting
For contractors looking to save time, cut costs, and deliver high-quality HVAC installations, PU Pre-insulated Ducting is a modern alternative worth serious consideration. It's a "sandwich" panel system-typically a rigid polyurethane (PU) foam core bonded between aluminum foil facings-that combines the duct structure and insulation into a single, lightweight product.
Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 3950*1200*20mm
Foam Density: 48kg/m3
Aluminum Thickness: 0.06mm or 0.08mm
Aluminum Color: Silver and Black
Packing: 10 sheets/ package
Loading Capacity: 710 sheets/ 40'HQ (packed with plastic bags)
660 sheets/ 40'HQ (packed with cardboard box)
Why Choose PU Pre-Insulated Ducting?
Faster Installation, Lower Labor Costs
This is often the biggest draw for contractors. The integrated design eliminates the need for separate on-site insulation wrapping, which is a major time sink with traditional metal ducts . Panels are lightweight-roughly 20-25% of the weight of insulated steel ductwork-making them easier to handle, especially in tight ceiling spaces . With simple joining systems like interlocking flanges and adhesive seals, installation can be 30-50% faster than traditional methods . This speed translates directly to lower labor costs and the ability to bid on more projects.
Space-Saving Design
In modern construction, ceiling space is prime real estate. Traditional GI ducts require the duct itself, plus a separate layer of insulation around it. PU pre-insulated ducts integrate the insulation into the panel, reducing the overall system thickness. This can save 6-8 inches of valuable ceiling space, which helps in achieving higher net ceiling heights and makes coordination with other MEP services much easier.
Superior Performance and Fewer Callbacks
The closed-cell structure of PU foam gives it excellent thermal properties, with thermal conductivity around 0.020 W/m·K . This helps keep energy bills down for your clients. The same closed-cell structure also resists moisture, preventing the condensation and mold issues that can plague metal ducts in humid conditions . This translates to fewer client callbacks related to sweating ducts or water damage.
Cleaner, More Hygienic Installation
Unlike traditional fiberglass insulation, PU duct panels do not release fibers or dust during cutting and installation . The smooth aluminum interior surface resists dust and bacterial buildup, making it an ideal choice for hospitals, clean rooms, and food processing facilities.
How to fabricate Rectangular Polyurethane (PU) pre-insulated Duct
Working with PU pre-insulated ducting is straightforward, but it requires a different skillset than working with metal. Here's the typical workflow:
Planning and Tracing: Plan the duct route and trace the required shapes onto the panel .
Cutting: Use standard hand tools-like a utility knife or a specialized cutter-to cut the panels . The foam core cuts cleanly without fraying or loose fibers .
Folding and Assembly: Panels are scored, folded, and glued at the joints using professional-grade adhesives .
Joining and Sealing: Sections are connected using specialized aluminum or PVC profiles, such as H-connectors and flanges . All joints, corners, and seams are sealed with aluminum tape and silicone sealant to ensure airtightness .
Reinforcement: For larger duct sizes or higher pressure systems, additional aluminum reinforcement sections may be added to maintain rigidity
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