Name: Pre Insulated PIR Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 305358387

Thanks to its excellent products and quality services, UNT Duct is one of the leading pre insulated 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.

Pre Insulated PIR Ducting

Pre Insulated PIR Ducting is integrated sandwich panels with closed-cell PIR foam core and double aluminum foil facings. Featuring λ≤0.022W/m·K, low air leakage and self-extinguishing property, it cuts installation labor by 40% for all commercial HVAC ventilation systems.

Structure: Silver Aluminum/ PIR Foam/ Silver Aluminum
Size: 3950*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)

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Our Honor & certificate

Since its establishment in 2013, UNT has obtained 17 patents and earned numerous industry honors. We are also certified to the ISO 9001, ISO 14001, and ISO 45001 international management standards.

December 2020: Awarded the National High-Tech Enterprise Certificate and the Fujian Provincial High-Tech Enterprise Certificate

December 2023: Awarded the National High-Tech Enterprise Certificate and the Fujian Provincial High-Tech Enterprise Certificate

November 2024: Listed in the Fujian Provincial List of Specialized, Refined, Differentiated and Innovative Small and Medium-Sized Enterprises

UNTDuct ISO 9001 2015

UNTDuct ISO 14001 2015

UNTDuct ISO 45001 2018

Fire Safety GB 8624-2012

Fire Safety BS476 Part6&7

Fire Safety ASNZS 1530.3

Thermal Conductivity

PID Panel Physical Property

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Material Structure and Physical Properties of Pre Insulated PIR Ducting

The pre-fabricated PIR insulation duct is a sandwich-type integrated composite structure. The core material is high-density closed-cell polyisocyanurate foam (with a density of 50–55 kg/m³), and it is double-sided bonded with 60–80 μm anti-corrosion embossed aluminum foil. The factory performs a one-time composite process, eliminating the need for on-site secondary insulation construction.

Core measured data: The thermal conductivity is stable at 0.018–0.022 W/(m・K), far superior to that of XPS ducts (0.030–0.035 W/(m・K)) and glass wool (0.035 W/(m・K)); the closed-cell ratio is over 95%, the water absorption rate is ≤1%, and there are no problems of water absorption expansion or insulation attenuation over the long term. Under the same insulation effect, a 20mm thick PIR duct is equivalent to a 45mm mineral wool insulation layer, with thinner panel thickness and reduced 30% of the ceiling space occupation.

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Energy Saving and Operating Costs of Pre Insulated PIR Ducting

Traditional galvanized iron sheet ducts require on-site application of insulation cotton, and numerous seams and flanges form heat bridges, resulting in a comprehensive heat loss of 12%–18% for the duct system. The PIR integrated sheet has no heat bridges, and the system's heat loss is controlled within 5%, reducing the annual air conditioning energy consumption by 20%–30%.

Based on a calculation for a 10,000-square-meter commercial complex: The annual air conditioning electricity cost for traditional iron sheet ducts is approximately 280,000 yuan. After replacing with PIR prefabricated ducts, the annual electricity savings are 62,000 yuan, and the material price difference can be recovered within 5 years. At the same time, the ducts have excellent air tightness, with an overall leakage rate of ≤2%, far lower than the 8%–12% leakage standard of iron sheet ducts. The fan's conveying efficiency is improved by 15%, and the fan operating power decreases simultaneously. This is suitable for the current building's low-carbon and energy-saving acceptance standards.

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Why choose UNTDuct

UNT Pre-insulated Ductwork

Packaging and Loading of Duct Panel

Packing of Duct Panel

Specification

Item	Unit	Specification
Standard Panel Size	mm	3950x1200x20
Alu. Foil Thickness	mm	0.06 or 0.08
PIR 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.

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