Name: Fireproof PIR Air Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 312189967

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

Fireproof PIR Air Ducting

Fireproof PIR Air Ducting represent a high-performance core solution for contemporary HVAC systems. Featuring an integrated sandwich structure with aluminium foil facings and a rigid PIR foam core, they deliver superior performance compared to conventional galvanised steel ducts that demand on-site insulation treatment. Suited for an extensive variety of projects, these duct panels are commonly specified for hotels, office complexes, airports, hospitals, as well as other commercial and public facilities.

Composition & Structure

The panel is a composite with a sandwich layout: Core Material PIR foam serves as the thermal insulation core, providing high thermal resistance and structural strength with low weight.

Facings Airtight protective layers attached to both sides:

80 μm Aluminum Foil: standard for general indoor use

200 μm Aluminum Sheet: higher strength for outdoor applications

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Why Choose Fireproof PIR Air Ducting?

UNTDuct PIR System is not only based on pre-insulated aluminium panels, but it also consists of accessories, tools and know-how necessary for the construction and installation in a masterly fashion. The UNTDuct Fireproof PIR Air Ducting is sandwich panel with external aluminum sheet covering a closed cell insulating material Polyisocyanurate (PIR) foam which has a density of 55 kg/m³.

UNTDuct Fireproof PIR Air Ducting can achieve an extremely high quality ducting can be achieved, as a direct result of excellent insulation property of PIR foam.

UNTDuct Fireproof PIR Air Ducting also provides excellent internal air quality, a fine external finish, longlife material, lightweight and easily transported, maniPIRlated and constructed.

Ducting systems constructed with UNTDuct Fireproof PIR Air Ducting can be installed either in the interior or on the exterior of a building, visible or with a false ceiling in residential and commercial use.

As well UNTDuct Fireproof PIR Air Ducting are an excellent option in industry sectors such as food processing, electronics, pharmaceuticals, hospitals & medical centers etc. Where there is a need for a provision of a high level of quality and hygiene.

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Key Technologies of Fireproof PIR Air Ducting

01.Aesthetic appearance:

The surface of Fireproof PIR Air Ducting is usually smooth aluminum foil or pre-coated galvanized iron sheet, which has a good appearance effect. It can be directly exposed indoors without additional decoration and is also easy to clean and maintain, meeting the aesthetic requirements of different building environments.

02.Good acoustic performance:

The sandwich structure (aluminum-insulating material - aluminum) of the Fireproof PIR Air Ducting gives it a certain sound insulation effect. The insulating material can prevent vibration and reverberation, reduce the noise generated during the operation of the air duct, and provide a quieter and more comfortable indoor environment.

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certification of Fireproof PIR Air Ducting

Fire Safety, Thermal Conductivity and Physical Performance

Fire Safety Class 0 (BS 476 Part 6&7)

Fire Safety

ASNZS 1530.3

thermal Conductivity

0.020w/M.k

Compress Strength

202KPA

foamed with CFC HCFC Free agent

Why choose UNTDuct

UNT Pre-insulated Ductwork

Project Case of UNTDuct

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.

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