Name: Insulation Duct Boards Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 306465683

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

Insulation Duct Boards

Insulation Duct Boards is a modern, high-performance alternative to traditional sheet metal ductwork. It is a prefabricated, rigid panel system used to create efficient air distribution networks for heating, ventilation, and air conditioning (HVAC) systems.

What It Is and How It's Made?

This duct is a pre-insulated sandwich panel. Its core is made of Polyisocyanurate (PIR) foam, a high-performance insulation material known for its excellent thermal properties and fire resistance. This core is permanently bonded on both sides to a protective layer of aluminum foil (or a thicker aluminum sheet for extra durability).

This design combines the structural duct, thermal insulation, and a vapor barrier into one lightweight board, simplifying the overall system. Standard technical specifications for these panels often include:

Core Density: ~53 kg/m³

Thermal Conductivity: ≤ 0.022 W/m·K (providing excellent insulation)

Standard Thickness: 10-42mm

Common Sizes: 1200mm width * 4000mm length

Fire Rating: Meets international standards like BS 476 Class 0 and ASTM E84 Class A due to the flame-retardant PIR core

Key Advantages of Insulation Duct Boards

Energy Efficiency & Operational Performance

Featuring ultra-low thermal conductivity PIR foam core, these pre-insulated duct panels drastically cut heat ingress and heat loss throughout ventilation networks. The outstanding thermal barrier effect delivers remarkable energy cost reductions while effectively eliminating surface condensation on ductwork.

Lightweight Structural Construction

Compared with conventional galvanized iron (GI) and all-metal steel duct systems, our panels boast drastically lower unit weight. This characteristic eases structural load bearing for building frameworks, and streamlines logistics delivery, on-site lifting and manual handling procedures.

Streamlined & Time-Saving Installation

Unlike metal ducts that demand separate cutting, forming, wrapping and secondary insulation workflows, pre-insulated duct boards enable one-piece single-stage assembly. This simplified workflow greatly compresses overall project construction periods and lowers labor expenses.

Outstanding Air Tightness Performance

The modular integrated panel structure paired with precision tongue-and-groove interlocking joints achieves exceptional air sealing performance, with air leakage rates regularly controlled under 2%. Reliable airtightness is essential to sustain stable HVAC operating efficiency and preserve premium indoor air quality.

Long Service Life & Sanitary Performance

The seamless smooth aluminum cladding delivers full corrosion resistance, effortless surface sanitization and superior sanitary properties, perfectly suited for stringent application scenarios including medical hospitals and industrial cleanrooms. The panel surface inhibits dust accumulation as well as mold and bacterial proliferation to safeguard indoor air standards. Engineered for extended operational lifespans of 20 to 30 years, the duct system requires only minimal routine maintenance.

Production and Installation of Insulation Duct Boards

Insulation Duct Boards manufactured in the factory have even density and accurate sizes, perfectly suited for mass production and standard construction.

On-site spray foaming works perfectly for irregular ducts and complex building layouts. The PIR foam fits closely to surfaces and leaves no blind spots for insulation - an irreplaceable strength over other insulation products.

This material is easy to install. Its soft texture can be cut and processed effortlessly, requiring no heavy equipment. One worker can finish the entire installation alone.

What's more, it has outstanding adhesion. It sticks firmly to color steel, metal sheets, cement mortar and other bases, and will not peel off or come loose throughout its service life.

Why choose UNTDuct

UNT Pre-insulated Ductwork

Production Progress of Duct Panel

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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