Name: PIR Air Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 311933952

Thanks to its excellent products and quality services, UNT Duct is one of the leading pir air 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 Air Ducting

The UNTDuct PIR Air Ducting represents an elite solution for high-efficiency ventilation and HVAC systems.

Constructed with a rigid polyisocyanurate (PIR) foam core sandwiched between double-sided aluminum foil facings, the panel delivers remarkable thermal resistance. It efficiently inhibits heat transfer and stabilizes air temperatures inside ductwork.

Beyond superior thermal performance, the panel features outstanding durability. Engineered to resist frequent operational loads and various environmental conditions, it sustains stable, reliable service over an extended service life.

Its innovative structure reshapes HVAC ducting solutions. The integrated insulation barrier drastically cuts energy loss. Less energy dissipation optimizes overall HVAC operational efficiency, bringing tangible cost savings and lowering carbon emissions.

All in all, the UNTDuctPIR Air Ducting is an ideal choice for contemporary ventilation and HVAC projects, balancing premium thermal performance, robust durability and outstanding energy-saving advantages.

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Why Choose PIR Air Ducting?

Thermal Insulation, Low Smoke Emission and Low Toxicity

PI foam exhibits inherent flame retardancy for enhanced fire safety. Its Limiting Oxygen Index (LOI) is typically higher than 34%, significantly surpassing the standard requirements for most flame-retardant materials.

Excellent Acoustic and Thermal Insulation Performance

With an open-cell structure featuring an open-cell fraction of up to 99%, PI foam achieves exceptional sound absorption. It attains a Noise Reduction Coefficient (NRC) of maximum 0.54 within the frequency range of 125–4000 Hz, efficiently attenuating airflow noise and mechanical operating noise in HVAC installations. Its thermal conductivity is lower than 0.022 W/(m·K), enabling reliable thermal insulation at low areal weight.

Ultra-Low Outgassing and Chemical Stability

Volatile substances released by materials under vacuum may lead to contamination of precision apparatus. Thanks to its ultra-low outgassing property, PI foam is widely utilised in aerospace applications and semiconductor cleanroom environments. The material also offers resistance against weak acid, weak alkali and common oils such as 93# gasoline, demonstrating excellent chemical inertness.

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How does PIR Air Ducting perform in terms of energy efficiency?

1.This PIR Air Ducting has excellent thermal insulation performance, effectively blocking heat transfer and minimizing cold/heat loss during air delivery.

2. Its fully sealed structure ensures superior airtightness, greatly reducing air leakage and avoiding unnecessary energy waste.

3. Stable insulation effect lowers the operating load of air conditioning and ventilation equipment, helping cut down long-term power consumption remarkably.

4. It maintains consistent indoor temperature steadily, optimizes overall HVAC operation efficiency, and brings prominent energy-saving benefits for projects.

5. Compared with traditional insulated duct solutions, the PIR Air Ducting achieves higher energy utilization rate and saves more operational costs year-round.

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Why choose UNTDuct

UNT Pre-insulated Ductwork

Project Case of UNTDuct

Project Case of Duct Panel

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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