Thanks to its excellent products and quality services, UNT Duct is one of the leading pur air conditioning ducts 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.
The Contractor's Edge: Why PUR Air Conditioning Ducts are the Future of Your HVAC Installations
Let's be honest: traditional sheet metal ductwork is heavy, labor-intensive, and eats into your margins with fabrication time and insulation labor.
For contractors seeking quicker installation, reduced worker fatigue, and the ability to supply clients with quieter, more energy-efficient systems, Rigid PU Pre-Insulated Duct Board is the product to specify.
This lightweight, monolithic HVAC panel replaces heavy sheet metal ductwork and separate external insulation. It cuts installation time by nearly 50%, delivers superior thermal performance and removes the threat of condensation.
Structure: Silver Aluminum/ PU Foam/ Silver Aluminum
Size: 3950*1200*20mm
Foam Density: 40-45kg/m3
Aluminum Thickness: 0.06mm or 0.08mm
Packing: 10 sheets/ package
Loading Capacity: 710 sheets/ 40'HQ (packed with plastic bags)
660 sheets/ 40'HQ (packed with cardboard box)

Application field of PUR Air Conditioning Ducts
1.1. Public buildings: Applicable to airport and railway station waiting halls, stadiums, theaters, exhibition halls, etc.
These buildings have large Spaces and high requirements for the lightness, insulation, fire resistance, water resistance, sound insulation and durability of the panels. Polyurethane sandwich panels can meet these demands.
1.2. Industrial plants and warehouses: Due to their advantages such as light weight, efficient installation, and flexible layout, they have become the first choice for single-story factories.
In multi-story industrial plants, it can not only be used for the roof but also for the flexible layout of the exterior walls, and the appearance of the building can be beautified through the diverse colors and shapes of the color-coated steel sheets.
For industrial buildings with constant temperature and humidity requirements, its excellent thermal performance can reduce operating costs.
Core Performance of PUR Air Conditioning Ducts

Super strong heat insulation and heat preservation performance
With polyurethane (PU) as the core material, its thermal conductivity is as low as ≤0.022W/(m · K), which is far superior to traditional materials such as rock wool (≥0.040W/(m · K)) and EPS (≥0.033W/(m · K)).
The core material has a closed-cell rate of over 95%, effectively blocking air convection and heat conduction. It maintains stable insulation performance in an environment ranging from -40 ℃ to 80℃, making it suitable for extreme scenarios such as low-temperature cold storage and high-temperature workshops.
Reliable fire resistance performance
The core material is added with environmentally friendly flame retardants and has passed the B1 grade test of GB 8624-2012 "Classification for Fire Performance of Building Materials and Products". When exposed to fire, it only carbonizes on the surface without generating molten droplets.
The smoke toxicity grade reaches "ZA1" (the lowest toxicity), meeting the fire protection requirements of industrial plants, public buildings, etc.
Anti-aging and structural strength
The surface coating can be selected from color steel plate, aluminum foil, glass fiber cloth, etc. It is resistant to acid and alkali, ultraviolet aging, and can resist rain erosion and temperature difference deformation when used outdoors.
The composite structure design enables the sheet to have a bending strength of ≥15MPa and a compressive strength of ≥20MPa, allowing it to be directly used as a sheet for the enclosure structure and reducing the need for additional supporting components.
Our Honor & certificate
Since its establishment in 2013, UNT has obtained 17 patents and earned numerous industry honors. We are also certified to the ISO 9001, ISO 14001, and ISO 45001 international management standards.
December 2020: Awarded the National High-Tech Enterprise Certificate and the Fujian Provincial High-Tech Enterprise Certificate
December 2023: Awarded the National High-Tech Enterprise Certificate and the Fujian Provincial High-Tech Enterprise Certificate
November 2024: Listed in the Fujian Provincial List of Specialized, Refined, Differentiated and Innovative Small and Medium-Sized Enterprises








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