Name: PIR Insulated Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 312297174

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

PIR Insulated Ducting

PIR Insulated Ducting act as a high-performance sustainable solution adopted in modern HVAC systems. Manufactured as an integrated sandwich assembly clad with aluminum foil facings and a rigid PIR foam core, they achieve superior performance versus conventional galvanized steel ducts which rely on on-site insulation installation. The eco-friendly PIR core delivers excellent thermal efficiency to reduce operational carbon emissions, with environmentally benign raw materials compliant with global sustainable construction criteria. These panels are extensively specified for hotels, office buildings, airports, hospitals and other commercial and public facilities.

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)

Send Inquiry

Thermal Insulation & Energy Saving of PIR Insulated Ducting

Boasting an extremely low thermal conductivity coefficient, our Lightweight PIR Air Ducting achieve superior and long-lasting thermal insulation performance.

They can effectively reduce unnecessary heat transfer inside HVAC ventilation systems, greatly curbing overall energy consumption and operational power loss.

Meanwhile, these insulation solutions perfectly eliminate cold bridge formation and effectively prevent surface condensation, moisture accumulation and related damp damages.

Regardless of seasonal temperature changes and diverse working environments, they can steadily maintain excellent thermal barrier effects, delivering consistent and reliable energy-saving benefits all year round, helping clients slash operating costs significantly while optimizing indoor temperature control efficiency.

Send Inquiry

Technical Advantages of PIR Insulated Ducting

Integrated Molding Process Ensures No Thermal Bridges

One-piece forming technology eliminates thermal bridges for seamless thermal insulation.

B1-Class Flame-Retardant Material (GB8624-2012)

Meets GB8624-2012 standard for B1-level fire-retardant performance.

Compressive Strength ≥300kPa

Withstands pressures of 300 kilopascals or higher, ensuring structural stability.

Modular Flange Connection System

Standardized flange modules enable quick installation and reduce on-site assembly time.

Send Inquiry

Why choose UNTDuct

UNT Pre-insulated Ductwork

Project Case of UNT Duct

Project Case

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.

Contact now

Hot Tags: pir insulated ducting, China, suppliers, manufacturers, factory, customized