Phenolic duct board Material Structure and Properties
Composite Structure: Composed of phenolic foam core material wrapped in double-layer aluminum foil (thickness ≥ 80μm), forming an integrated fire-resistant and thermal insulation board.
Flame Retardant Performance: Passes the ASTM E84 test with a flame spread index ≤ 10 and a smoke index of 0, meeting the B1-class building fire safety standard.
Thermal Insulation Performance: Features a low thermal conductivity of 0.02–0.03 W/(m·K), effectively reducing cold and heat loss.
Physical Stability: With a density range of 45-60 kg/m³, it is adaptable to extreme environments.
Phenolic duct board Performance Characteristics
Excellent thermal insulation performance: Phenolic foam has a low thermal conductivity, typically ranging from 0.02 to 0.03 W/(m·K). It can effectively reduce cold/heat loss in air conditioning systems and improve energy utilization efficiency.
Superior fire resistance: The core material generally achieves a combustion performance grade of B1 (flame-retardant) or higher, with some products reaching grade A2. It does not produce toxic thick smoke or dripping substances during combustion, meeting building fire safety requirements.
Lightweight yet high-strength: Phenolic air duct boards have a density of approximately 40–60 kg/m³, making them lightweight and easy to transport and install. Meanwhile, they possess certain compressive and flexural strength to maintain structural stability during use.
Strong water resistance: Thanks to its closed-cell structure, the water absorption rate is low (volume water absorption ≤ 8% in general), which can effectively prevent degradation of insulation performance and board deformation caused by water absorption.
Size Specifications:
Common thicknesses include 20mm, 25mm, 30mm, and 40mm. The width is generally 1200mm, and lengths are available in various specifications such as 2950mm and 3950mm. Customization is also available according to customer requirements.
why choose UNTDuct PIR System
The UNTDuct pre-insulated duct system stands out for modern HVAC projects with its key advantages. Its integrated design combines high-performance insulation cores and protective panels, boasting ultra-low thermal conductivity (0.022 W/m·K) to reduce energy loss and boost efficiency. Around 70% lighter than traditional galvanized steel ducts, its modular installation shortens construction time and cuts labor costs, suiting renovations well. Rigid foam cores and sturdy aluminum panels ensure strong stability, while the closed-cell structure blocks moisture, prevents mold, and guarantees over 20 years of service. Precision joints and smooth inner walls minimize air leakage and dust buildup, protecting air quality-ideal for hospitals and food facilities. Compliant with ASTM E84 and UL 181, it offers excellent fire resistance for strict settings like high-rises. With customizable sizes and thicknesses, plus long-term energy savings and low maintenance, it delivers both performance and cost-effectiveness.
Project Case of Pre-insulated ductwork
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