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PalDuct PIR Foam Panel

Introduction and in-depth analysis of PalDuct PIR air duct pre-insulation sheet products: In the design of HVAC (heating, ventilation, and air conditioning) systems in modern buildings, it has become a core trend to comprehensively consider energy conservation, energy reduction, fire safety, construction efficiency, and space utilization. PalDuct PIR (polyisocyanurate) pre-insulated air duct sheet, as an upgraded alternative to traditional galvanized iron sheet air ducts, with its outstanding physical and chemical properties, is becoming the preferred choice for green buildings.

Structure: Silver Aluminum/ PIR 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 cardboardbox)

Polyurethane (PU) Foam Pre-Insulated HVAC Ductwork Panel

Core Materials and Structure of PalDuct PIR Foam Panel

The PalDuct PIR sheet adopts an advanced three-layer composite structure. The core layer is high-density polyisocyanurate (PIR) rigid foam, and the double-sided composite thickness of the embossed or smooth aluminum foil is not less than 80 micrometers.

The chemical advantages of PIR: Compared to ordinary polyurethane (PU), PIR introduces isocyanurate rings into its molecular structure. This special cyclic structure forms a solid carbonized protective layer on the surface rapidly when exposed to flames, effectively blocking oxygen diffusion and preventing the spread of the fire.

High density leads to high strength: The core material density of the product is typically controlled within 45+/-5kg/m3. This optimal density range not only ensures that the sheet has sufficient compressive and bending strength but also avoids unnecessary material costs due to excessive density.

Outstanding Thermal Insulation and Energy Saving of PalDuct PIR Foam Panel

The thermal conductivity is the most critical indicator for evaluating the insulation performance of ducts. PalDuct has significantly reduced the heat loss of the air conditioning system to an extremely low level.

Ultra-low thermal conductivity: At a nominal temperature of 10°C, the initial thermal conductivity of PalDuct PIR is approximately 0.022 W/(m·K), which is much lower than that of rubberized foam (about 0.035) and glass wool (about 0.038).

Actual energy-saving benefits: Based on actual engineering calculations, in a refrigeration system for long-distance cold air transportation (such as inlet air at 7°C), using PalDuct PIR ducts can reduce the temperature rise along the pipeline by more than 35% compared to the traditional "galvanized iron sheet + large-capacity glass wool" system. The overall energy consumption of the fan and the main unit can be reduced by approximately 12% - 15%, with an extremely high return on investment (ROI).

Comparison of Installation Efficiency and Comprehensive Cost of PalDuct PIR Foam Panel

Traditional iron sheet ducts require a cumbersome process of "factory processing---on-site hoisting----secondary wrapping of insulation cotton", but PalDuct has achieved an "integrated" revolution.

Evaluation Dimension	Traditional Galvanized Iron + Glass Wool Duct	PalDuct PIR Pre-insulated Duct
Installation Process	Cutting, sheet metal jointing, hanging, and external wrapping of insulation wool (4 steps total).	Marking, cutting, gluing, and 45-degree jointing (Integrated, single-step installation).
Installation Speed	Slow; heavily reliant on heavy machinery and on-site welding/jointing.	Fast; 3 to 4 times quicker, requiring only standard hand tools.
Space Occupancy	Large; requires reserving 50mm+ space around the duct for insulation wrapping.	Small; can be installed tight against the ceiling, saving 5–10 cm of headroom.
Air Leakage Rate	Higher; prone to air leakage at joints and flange connections.	Extremely low; 45-degree mitered joints with professional adhesive ensure near-zero leakage.