Thanks to its excellent products and quality services, UNT Duct is one of the leading pir hvac air duct 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.

PIR HVAC Air Duct

Square PIR pre-insulated duct panels are factory-manufactured for high-performance HVAC ductwork. The rigid PIR foam core features outstanding thermal insulation and fire resistance.

Construction & Key Materials

Sandwich composite structure: Core Material Lightweight rigid PIR foam core with high thermal resistance and structural strength.

Facings Airtight protective layers attached to both sides:

80 μm Aluminum Foil: standard for general indoor use

200 μm Aluminum Sheet: higher strength for outdoor applications

Structure: Silver Alu. Foil/ PIR Foam / Silver Alu. Foil

Foam Density: 50-55kg/m³

Standard Size: 3950mm*1200mm

Thickness: 20mm

Alu. Foil: 60 or 80 Micron

Packing: 10 sheets/ package

Why Choose PIR HVAC Air Duct?

Thermal Insulation, Low Smoke Emission and Low Toxicity

PI foam exhibits inherent flame retardancy for enhanced fire safety. Its Limiting Oxygen Index (LOI) is typically higher than 34%, significantly surpassing the standard requirements for most flame-retardant materials.

Excellent Acoustic and Thermal Insulation Performance

With an open-cell structure featuring an open-cell fraction of up to 99%, PI foam achieves exceptional sound absorption. It attains a Noise Reduction Coefficient (NRC) of maximum 0.54 within the frequency range of 125–4000 Hz, efficiently attenuating airflow noise and mechanical operating noise in HVAC installations. Its thermal conductivity is lower than 0.022 W/(m·K), enabling reliable thermal insulation at low areal weight.

Ultra-Low Outgassing and Chemical Stability

Volatile substances released by materials under vacuum may lead to contamination of precision apparatus. Thanks to its ultra-low outgassing property, PI foam is widely utilised in aerospace applications and semiconductor cleanroom environments. The material also offers resistance against weak acid, weak alkali and common oils such as 93# gasoline, demonstrating excellent chemical inertness.

Construction and Environmental Protection Characteristics of PIR HVAC Air Duct?

Convenient construction:

It can be freely cut, supports on-site spraying or modular installation, firmly adheres to various substrates, and can eliminate the cold bridge effect.

Environmental protection and safety:

Utilizing fluorine-free foaming technology, it does not contain ozone-depleting substances such as CFCs and HCFCs, complies with RoHS standards, and has a low global warming potential (GWP). It is recommended that the ambient temperature during construction be between 15 and 35 degrees Celsius and the humidity be less than 85%. Protective measures should be taken.