Name: PIR HVAC Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 310117746

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

PIR HVAC Ducting constitute a high-performance and eco-conscious solution for modern HVAC systems.

Designed as an integrated sandwich composite with aluminum foil facings and a rigid PIR foam core, they surpass conventional galvanized steel ducts that require separate on-site insulation work.

Thanks to low thermal conductivity and optimised material composition, these duct panels help cut energy consumption throughout the system lifecycle.

Free from harmful blowing agents and boasting outstanding thermal stability, they align with sustainable building standards. Widely specified for hotels, office buildings, airports, hospitals and a broad range of commercial and public green building projects.

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Technical Data Sheet And Certificate of PIR HVAC Ducting

Property	Specification	Explanation
Foam Density	50-55kg/m³	Provides rigidity and durability
Aluminum Foil Thickness	60/80 microns	Adds durability and insulation
Thermal Conductivity	0.02 W/m·K	Offers excellent thermal insulation to minimize energy loss
Fire Rating	BS 476 Part 6 & 7 Class 0	Ensures strong fire resistance
Compressive Strength	0.25 MPa	Provides reliable structural support
Bending Strength	2 MPa	Allows flexibility to withstand bending without cracking
Water Absorption	0.1%	Ensures high moisture resistance
Dimensional Stability	0.3%	Maintains stability in varying environments
Maximum Wind Velocity	13-20 m/s	Suitable for high-velocity airflows
Maximum Operating Temperature	80℃	Ideal for high-temperature environments

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certification of PIR HVAC Ducting

Fire Safety, Thermal Conductivity and Physical Performance

BS 476 Part 6&7

ASNZS 1530.3

thermal Conductivity

Compress Strength

CFC HCFC Free

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UNT Pre-insulated Ductwork

Project Case of UNT Duct

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.

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