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Pre-insulated Phenolic HVAC Duct

Pre-insulated phenolic HVAC duct is a type of ductwork fabricated from rigid panels that have an insulating phenolic foam core bonded between two sheets of aluminum foil . This integrated construction combines the functions of air conveyance, thermal insulation, and vapor retardation into a single system, offering a modern alternative to traditional sheet metal ducts that require separate, on-site insulation.

Structure: Silver Aluminum/ Phenolic Foam/ Silver Aluminum
Size: 3950*1200*20mm
Foam Density: 50kg/m3
Aluminum Thickness: 0.06mm
Aluminum Color: Silver
Packing: 10 sheets/ package
Loading Capacity: 660 sheets/ 40'HQ (packed with cardboard box)

Key Characteristics of Pre-insulated Phenolic HVAC Duct:

Feature	Typical Value / Description	Common Benefits
Core Material	Closed-cell phenolic foam	Excellent thermal insulation, fire resistance, lightweight
Facing Material	Aluminum foil (plain)	Durable vapor barrier, corrosion resistance, clean air surface
Thermal Conductivity	0.025 W/mK	High energy efficiency, reduced heat loss/gain
Weight	~75% lighter than insulated sheet metal	Easier handling, faster installation, reduced structural load
Fire Performance	Class 0 / Class A	High level of safety, meets strict building codes
Core Density	~50 kg/m³	Good structural strength and durability

High-Performance Material Properties

The performance of phenolic duct systems is defined by the synergistic properties of its components.

Excellent Thermal Efficiency:

The closed-cell phenolic foam core provides superior insulation. With a thermal conductivity as low as 0.025 W/mK , it significantly reduces energy loss from heating or cooling air as it travels through the system . This high "R-value" (thermal resistance) can be achieved with thinner duct walls, saving valuable building space .

Superior Fire Safety:

Phenolic foam is recognized as one of the most fire-resistant insulation materials. Duct systems typically achieve a Class 0 or Class A fire rating, meaning they have low surface flame spread and smoke development . This makes them suitable for projects with stringent fire safety requirements.

Lightweight and Durable Construction:

These ducts are approximately 75% lighter than traditional insulated sheet metal . This weight reduction simplifies logistics and installation. The aluminum foil facings provide a robust, impact-resistant surface that also acts as a perfect vapor barrier, preventing moisture ingress and protecting the foam core's thermal performance over time .

Clean and Hygienic Airflow:

The smooth aluminum interior surface is non-fibrous, corrosion-resistant, and easy to keep clean . It does not shed particles or support microbial growth, ensuring the quality of the delivered air and making it ideal for hospitals, clean rooms, and pharmaceutical facilities

How to Select the Right System?

Choosing the right phenolic duct system involves considering several factors:

Facer Type: Standard aluminum facers are suitable for most indoor applications. For enhanced durability in rough handling or specific job requirements, panels with reinforced aluminum facers (containing fiberglass) are available .

Thickness: Panels are typically available in 20mm and 30mm thicknesses . The choice depends on the required thermal performance (R-value) for the specific project and local energy codes.

Application: While suitable for indoor use, outdoor installations require additional weather protection, such as specialized cladding, to shield the ducts from UV radiation and weather exposure .

In summary, pre-insulated phenolic HVAC duct offers a compelling combination of energy efficiency, fire safety, and installation speed, making it a high-performance choice for modern building projects.