Thanks to its excellent products and quality services, UNT Duct is one of the leading fire rated hvac duct board 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.
Fire Rated HVAC Duct Board
Fire Rated PIR (Polyisocyanurate) HVAC Duct Board is a pre-insulated panel system used to construct air distribution ducts that combine thermal efficiency with a certified fire performance. It typically consists of a rigid PIR foam core bonded between two layers of aluminum foil or other facings. Its fire rating and overall performance make it an advanced alternative to traditional metal ductwork for many HVAC projects.
Fire Performance and Key Ratings:
The fire rating is the defining feature of this duct board, validated by independent testing standards.
Certified Fire Ratings: High-performance PIR duct panels can achieve a Class 0 fire rating under the BS 476 standard, or a B1 grade according to GB8624-2006. In the European standard (EN 13501-1), a classification of B-s1, d0 is attainable, indicating very limited contribution to fire spread and smoke production.
Combustion and Smoke Characteristics: Some PIR boards are formulated to produce minimal toxic smoke and do not release black toxic smoke when burning. For instance, a smoke toxicity rating of < 4.5 can be achieved under the British Naval Engineering Standard (NES 713).
Key Properties of Fire Rated PIR HVAC Duct Board
Beyond its fire resistance, the board's construction provides a range of performance benefits:
Superior Thermal Insulation:
The PIR foam core is an exceptional insulator. It typically has a very low thermal conductivity of around 0.020 to 0.022 W/m·K, which contributes to high energy efficiency and stable air temperatures within the duct.
Lightweight and High Strength:
The sandwich construction results in a panel that is significantly lighter than traditional metal ducts while still offering high compressive and tensile strength, with figures like 202 KPa for compressive strength and 423 KPa for tensile strength commonly cited.
Operational Limits:
This material is designed for a specific operating temperature range. The maximum continuous working temperature for air within the duct is generally around +80°C, with some variants rated for extreme lows down to -265°C.
Main Production Process of Fire Rated PIR HVAC Duct Board
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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