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PIR ALU Pre-insulated Duct Panels

Polyisocyanurate(PIR) Foam Pre-Insulated HVAC Ductwork Panel is a high-performance, all-in-one solution designed for modern heating, ventilation, and air conditioning (HVAC) systems. Built with a precision-engineered sandwich structure, it features a dense Polyisocyanurate(PIR)foam core-celebrated for its exceptional thermal insulation properties-sandwiched between two protective layers of corrosion-resistant aluminum foil. This factory-prefabricated panel merges insulation, structural strength, and airtightness into a single component, eliminating the need for separate insulation installation and streamlining ductwork setup in diverse buildings.

Structure: Silver Aluminum/ PIR Foam/ Silver Aluminum
Size: 3950*1200*20mm
Foam Density: 50-55kg/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)

Product Structure and Material of PIR ALU Pre-insulated Duct Panels

The PIR ALU prefabricated insulation duct panel is composed of a double-layer aluminum foil and PIR rigid foam core material.

It is an integrated finished sheet. The aluminum foil surface layer has excellent air tightness, anti-aging properties and mechanical strength, which can protect the core material from external force damage, water vapor penetration and ultraviolet damage.

The PIR core material in the middle is of a closed-cell structure, with extremely low water absorption rate, and is not prone to moisture absorption, mold growth or deformation.

It has strong long-term stability. Different from the traditional iron sheet ducts with external insulation, this product integrates the structural layer, insulation layer and protective layer into one, eliminating the need for secondary insulation procedures on-site.

It achieves efficient, durable and lightweight performance from the material structure.

Fire Resistance and Safety of PIR ALU Pre-insulated Duct Panels

High-quality PIR ALU duct panels typically possess excellent fire resistance properties, achieving a high flame retardant level.

They can self-extinguish upon exposure to fire, do not drip, produce little smoke, and are non-toxic, meeting the fire safety requirements for public buildings.

In a fire scenario, the material does not generate toxic smoke, which is conducive to the evacuation of personnel and fire rescue operations.

The aluminum foil surface layer is non-combustible, enhancing the overall fire resistance safety, making it suitable for densely populated areas such as hospitals, schools, shopping malls, and underground spaces, and meeting strict engineering acceptance standards.

Durability and Service Life of PIR ALU Pre-insulated Duct Panels

The PIR closed-cell structure is non-absorbent, non-moldy, and non-decomposable. It maintains stable performance even in humid environments and is less likely to experience problems such as insulation layer detachment, cracking, or failure.

The aluminum foil surface layer is corrosion-resistant and aging-resistant, capable of withstanding acid and alkali environmental erosion and extending the overall lifespan of the duct.

The overall strength of the duct is high, it is resistant to compression, and does not deform easily. After long-term use, it still maintains good airtightness and structural stability, with extremely low maintenance costs.

The overall cost-effectiveness of this duct throughout its entire life cycle is much higher than that of traditional ducts.

Core Technical Parameters of PIR ALU Pre-insulated Duct Panels

Parameter item	Typical value	Note
thermal conductivity λ	0.022 W/m·K(20℃)	0.020 – 0.024 W/m・K falls within the excellent range.
duct thickness	15/20/25/30/40 mm	20mm is the mainstream for commercial projects.
demension	3950×1200mm or 2900×1200mm	Can be customized according to the project.
thickness of alu. foil	0.06 or 0.08mm (embossing)	The inner and outer aluminum layers enhance the air tightness and durability.
foam density	50-55 kg/m³	Taking into account both strength and insulation efficiency
fire safety	BS476 Part6/7 Class 0,EN13501-1 B-s1,d0	Low smoke and non-toxic, it extinguishes by itself when exposed to fire.
Water Absorption Rate	<1% (by volume)	Closed-cell structure, moisture-proof and mold-proof
Surface density	2–4 kg/m²	It is approximately 70% lighter than traditional insulated iron pipe ducts.