Name: PIP Air Duct Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 305741411

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

PIP Air Duct

PIP Air Duct is integrated pre-insulated HVAC duct panels with PIR/PU closed-cell foam core and double aluminum facings. It features ultra-low thermal conductivity, light weight, tight air sealing and fast assembly, widely applied in commercial buildings, clean workshops and data centers for energy-saving ventilation.

Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 4000*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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Panel assembly components of PIP Air Duct

The PIP air duct is a three-layer integrated sandwich structure. The outer layer is 60/80μm embossed aluminum foil, and the core layer is high-density closed-cell PIR/PU rigid foam. There is no on-site secondary composite process. Standardized parameters support stable performance.

Core material indicators: Foam density 40–50kg/m³, closed-cell rate ≥ 95%, thermal conductivity 0.018–0.022W/(m・K), water absorption rate < 0.1%, preventing moisture-induced failure; Panel thickness is divided into 20/25/30/40mm to meet different insulation requirements.

Structural strength: Compressive strength 0.25MPa, capable of withstanding 1500Pa air pressure, smooth inner wall with low wind resistance, maximum ventilation wind speed up to 20m/s; Finished product self-weight is only 1.4–4.5kg/㎡, traditional iron sheet air ducts have an insulation weight of 15–20kg/㎡, weight reduction of over 70%.
Sealing process: Integrated molding without cold or hot bridge, dedicated splicing sealing structure leakage rate ≤ 2%, much lower than the 8%–15% leakage standard of traditional iron sheet air ducts, in line with GB 50243 acceptance specifications.

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Construction and Installation Efficiency of PIP Air Duct

Traditional galvanized iron sheet ducts require three processes: sheet metal fabrication, on-site insulation wrapping, and installation of protective layers; while PIP factory-prepared panels only require two processes: cutting and splicing. The installation period is shortened by 30%–50%.

Labor input: For a single section of traditional ducts, it requires 4–6 workers; with PIP, only 2–3 workers can complete the task, significantly reducing the risk of high-altitude work; for a 100㎡ ventilation duct project, the iron sheet duct takes 5 days to install, while the PIP duct only takes 2–3 days.

Supplementary materials and waste: There is no rock wool dust on the site, and the waste from corners is reduced by 60%. This is suitable for high environmental protection construction scenarios such as hospitals, high-end decoration, and clean workshops; no lifting equipment is needed, and the transportation and loading/unloading costs are reduced by 40%.

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Fire protection, durability and operation and maintenance costs of PIP Air Duct

Fire safety: The core layer of PIR foam is of B1 class flame-retardant, and the aluminum foil surface layer is an A1 non-combustible material. It has low smoke emission and no dripping during combustion, meeting international fire protection standards such as BS 476 and EN13501, and is suitable for high-risk fire scenarios such as data centers, subways, and hospitals.

Service life: Corrosion-resistant. After 720 hours of immersion in acidic or alkaline environments, the strength retention is 95%. There are no rust or powdering problems. The designed service life is 20 years. Traditional iron sheet ducts are prone to rusting, with a service life of only 5–8 years, and phenolic ducts are prone to cracking and damage within 3–5 years.

Operation and maintenance costs: Surface moisture-proof and anti-corrosion treatment, no need for annual rust removal and painting. The annual maintenance cost is only 30% of that of traditional ducts; the leakage volume is low, reducing the load of the main unit, and the fan loss and equipment maintenance frequency are simultaneously reduced, resulting in a 30%–40% reduction in the overall cost throughout the life cycle.

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Why choose UNTDuct

UNT Pre-insulated Ductwork

Project Case of UNT Ductwork

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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