Introduction of PIR (Polyisocyanurate) Pre-insulated Sandwich Ducts
is a type of HVAC (Heating, Ventilation, and Air Conditioning) duct system designed with a sandwich-like layered structure that integrates insulation directly into its construction, eliminating the need for separate insulation installation. This all-in-one design enhances efficiency, reduces installation time, and ensures consistent thermal performance.
Panel Structure: Silver Alu. / Blue PIR Foam / Silver Alu. Foil
Foam Density: 50kg/Cbm
Panel Dimension: 3950mm*1200mm*20mm
Alu. Foil: 0.06mm (Embossed)
Packing: 10 Sheets/ Packages
Key Components of Pre-insulated Sandwich Ducts & Its Structure
As the name suggests, it typically consists of three main layers (like a sandwich):
Inner Layer:
A smooth, airtight lining (often aluminum foil or galvanized steel) that comes into contact with the airflow. This layer resists corrosion, prevents dust accumulation, and ensures clean air distribution.
Insulation Core:
A central layer of high-performance insulating material, most commonly polyisocyanurate (PIR) foam or phenolic foam. These materials have low thermal conductivity, excellent closed-cell structure (to resist moisture), and high density, providing superior heat retention or loss prevention.
Outer Layer:
A protective outer skin (usually aluminum or metal sheets) that shields the insulation core from physical damage, moisture, and external environmental factors (e.g., temperature fluctuations, humidity).
Key Advantages of Pre-insulated Sandwich Ducts
Space-saving:
The integrated design eliminates the need for additional insulation wrapping, reducing the overall duct thickness.
Energy efficiency:
The core insulation minimizes heat transfer between the duct interior and the surrounding environment, lowering HVAC energy consumption.
Easy installation:
Lightweight and prefabricated, these ducts can be quickly assembled on-site with specialized tools, cutting labor time.
Hygiene:
Smooth inner surfaces and closed-cell insulation resist mold, mildew, and dust buildup, improving indoor air quality-ideal for sensitive settings like hospitals or food facilities.
Pre-insulated sandwich ducts are widely used in residential, commercial, and industrial buildings, particularly where thermal efficiency, quick installation, and space constraints are priorities.
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