Thanks to its excellent products and quality services, UNT Duct is one of the leading fire rated hvac pir 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 PIR Duct Board
Fire Rated HVAC PIR Duct Board from UNTDuct is a modern, integrated, structural-insulating ventilation solution engineered as a high-performance alternative to traditional metal ducts. It combines the air channel, thermal insulation, and a robust fire-resistant barrier into a single, lightweight, prefabricated panel-eliminating the need for separate, on-site insulation wrapping.
What sets this system apart is its dual-layer fire defense:
The Aluminum Foil Facings (The First Line of Defense) – Both the inner and outer surfaces of the board are laminated with high-strength, fire-rated aluminum foil (typically 0.06mm to 0.08mm thick). This foil is not merely a vapor barrier; it is an active fire-protective layer. In a fire, the aluminum foil reflects radiant heat, resists direct flame impingement, and acts as a sacrificial shield that delays heat penetration into the core. Its non-combustible nature (Class A surface rating) prevents the duct surface from igniting and significantly reduces surface flame spread.
The PIR Foam Core (The Second Line of Defense) – Beneath the foil, the Polyisocyanurate (PIR) foam core provides the ultimate thermal barrier. When exposed to extreme heat, PIR does not melt or drip; instead, it rapidly forms a dense, insulating char layer that self-extinguishes, slows flame propagation, and drastically limits toxic smoke release. This charring action, protected by the outer foil, buys precious evacuation time.
Together, the aluminum foil + PIR core composite has passed rigorous international fire standards, including:
BS 476 Part 6&7 Class 0 (UK)
GB 8624 Class A (China)
Advantages of Fire Rated HVAC PIR Duct Board
The UNTDuct PIR system offers several significant benefits compared to traditional metal ducts that require separate, on-site insulation:
Superior Energy Efficiency:
The PIR foam core has an ultra-low thermal conductivity, typically 0.022 W/m·K. This excellent insulation can reduce HVAC system energy consumption by an estimated 30% to 40%.
Lightweight & Quick to Install:
The boards weigh only about one-third of traditional metal ducts, making them easier to transport and handle. The modular, pre-fabricated design significantly speeds up installation, potentially shortening the construction period by more than 50%.
Durable and Moisture-Resistant:
The closed-cell structure of the PIR foam, combined with a sealed aluminum foil facing, provides excellent resistance to moisture and corrosion. This helps prevent mold growth and ensures a long service life of over 20 years.
Clean and Environmentally Friendly:
The smooth inner surface minimizes dust accumulation, making it suitable for hospitals, clean workshops, and other settings where air quality is critical. The manufacturing process also uses CFC/HCFC-free blowing agents, aligning with green building standards.
How to make Staight Air Ducts with Fire Rated HVAC PIR Duct Board
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