Name: Energy Saving PIR Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 312042487

Thanks to its excellent products and quality services, UNT Duct is one of the leading energy saving pir 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.

Energy Saving PIR Ducting

Featuring high-performance PIR foam as the core substrate, Energy Saving PIR Ducting are lightweight composite materials that combine thermal insulation, structural strength and certified fire resistance as a complete assembly, widely applied in HVAC construction.

This integrated modular duct solution reduces system energy loss, expedites on-site installation, and sustains stable ventilation efficiency during long-term operation.

Panel Structure: Aluminum foil/ PIR Foam / Aluminum foil
Foam Density: 50-55kg/M3
Panel Dimension: 3950mm*1200mm*20mm
Alu. Foil: 60 Micron (Embossed)

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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Acoustic Environment of Energy Saving PIR Ducting

Traditional ducts often neglect noise control. However, PI foam, with its unique porous structure, has become the "invisible tuner" for improving the acoustic environment of buildings.

Broadband sound absorption characteristics: The noise of the duct system is mainly in the mid-low frequency range and has strong penetrating power. Research shows that the noise reduction coefficient (NRC) of PI foam can reach above 0.75, and its average sound absorption coefficient exceeds 0.6. This means that it not only can absorb wind noise but also can effectively suppress the vibration-induced noise radiated from the pipe wall. Without the need for additional installation of mufflers, it can reduce indoor noise by 5-8 decibels.

Flow channel acoustic optimization: The PI sheet can be directly used as the inner lining of the duct. Its rough surface can effectively disrupt the boundary layer airflow compared to the smooth surface of metal, thereby reducing the generation of vortex noise.

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Fire Resistance and Moisture Resistance of Energy Saving PIR Ducting

Fire Resistance Class: Euroclass B-s2,d0 (for some models C-s2,d0), non-flammable, low smoke, no dripping.

Combustion Characteristics: When exposed to fire, it chars but does not melt, the smoke is low in toxicity, and complies with EN 13501-1 and HVAC duct safety standards.

Application Safety: Suitable for densely populated places such as shopping malls, hospitals, and office buildings, and has passed FM and CE certifications.

Moisture Resistance and Durability
Absorption rate: ≤ 1% (long-term immersion), double-layer barrier of closed-cell + aluminum foil, completely vapor-proof (aluminum foil > 50 μm), eliminating condensation water and mold.

Corrosion resistance: Aluminum foil is resistant to oxidation and acid-base, PIR core is resistant to aging, with a service life of ≥ 20 years, maintenance-free, twice as long as traditional ducts in terms of lifespan.

Antibacterial: Smooth surface for easy cleaning, inhibits bacterial growth, suitable for scenarios with high hygiene requirements such as clean rooms and food factories.

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Why choose UNTDuct

UNT Pre-insulated Ductwork

What is UNTDuct System

UNT Duct System

Specification

Item	Unit	Specification
Standard Panel Size	mm	3950x1200x20
Alu. Foil Thickness	mm	0.06 or 0.08
Foam Density	kg/m³	50-55
Fire Safety (BS476Part 6&7)		Class 0
Thermal Conductivity	W/(m·K)	0.020
Compressive Strength	MPa	0.2
Bending Strength	MPa	2
Water Absorption	%	0.36
Dimension Change	%	0.3
Working Temperature	℃	-60 to +80
Max Pressure in duct	Pa	1500
Maximum Allowable Wind Velocity	m/s	≤15
Max Continuous Running Temperature	℃	≤70
Lifespan of PIR Air Duct	years	>20

PRE-INSULATED DUCT vs G.I. DUCTWORK

Metric	20mm PIR 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 PIR 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 PIR. 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. PIR 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 PIR, 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 PIR 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 PIR duct panels, fabrication tools, jointing accessories, reinforcement components and related materials for complete pre-insulated duct fabrication.

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