Fiberglass ducts are widely used in buildings, central air conditioning systems, and ventilation ducts due to their excellent thermal insulation, corrosion resistance, and environmental performance. Understanding the core technical parameters of fiberglass ducts is fundamental to ensuring project quality and cost control. This article will provide a detailed analysis of the key parameters of fiberglass ducts from a technical perspective to help you choose the most suitable product.

I. Thermal Conductivity: A Core Parameter Affecting Insulation Performance

Thermal conductivity is an important indicator for measuring the thermal insulation performance of fiberglass ducts. The thermal conductivity of fiberglass ducts is typically between 0.035 W/(m·K) and 0.045 W/(m·K). The low thermal conductivity makes fiberglass ducts excellent at maintaining temperature stability.

Energy Saving Effect: The lower the thermal conductivity, the less heat loss. Choosing fiberglass ducts with low thermal conductivity can effectively reduce the energy consumption of air conditioning systems and improve overall energy efficiency.

II. Density: Affecting Strength and Flexibility

The density of fiberglass ducts is typically between 45–70 kg/m3. Higher-density fiberglass ducts generally have better compressive strength but poorer flexibility; while lower-density ducts have an advantage in flexibility, making them suitable for more complex construction environments.

High-density ducts: Suitable for applications with high mechanical loads, such as industrial air conditioning systems.

Low-density ducts: Suitable for areas with flexible layouts, such as residential and commercial air conditioning systems.

III. Compressive Strength and Durability

The compressive strength of a fiberglass duct determines the external pressure it can withstand. Generally, the compressive strength of fiberglass ducts is ≥ 200 kPa. This value ensures that it will not be flattened in complex environments, maintaining good airflow efficiency.

Long-term stability: High compressive strength fiberglass ducts can effectively resist pressure changes in airflow, are not easily deformed, and ensure long-term stable system operation.

IV. Corrosion Resistance: Ensuring Duct Lifespan

Fiberglass ducts typically use corrosion-resistant glass fiber reinforcement materials, ensuring long-term use in humid, acidic, and alkaline environments. The corrosion resistance of fiberglass ducts makes them particularly important in corrosive environments such as industrial plants and chemical plants.

Long-term use: Their excellent corrosion resistance extends the service life of the ducts, reducing maintenance and replacement costs caused by corrosion.

V. Temperature range: Adaptable to different operating conditions

Fiberglass ducts typically have a temperature range of -30℃ to +250℃, capable of adapting to temperature variations in most ventilation and air conditioning systems.

Environmental adaptability: For special environments (such as hot air ducts or refrigeration systems), fiberglass ducts maintain excellent performance, avoiding duct deformation and condensation problems caused by temperature differences.

VI. Flame retardant properties: Improved system safety

Fiberglass ducts have good flame retardant properties, typically meeting the B1 flame retardant standard. This property effectively reduces the risk of fire in high-temperature operating environments.

Safety assurance: In the event of a fire, fiberglass ducts do not produce large amounts of smoke and are rapidly self-extinguishing, ensuring the safety of the building.

VII. Environmental Performance: The First Choice for Green Building Materials

Fiberglass ducts are manufactured using environmentally friendly materials, containing no harmful substances and complying with international environmental standards such as RoHS and REACH.

Healthy and Harmless: Ventilation systems using fiberglass ducts do not release toxic or harmful substances, making them suitable for hospitals, schools, commercial buildings, and other locations with high air quality requirements.

A thorough understanding of the technical parameters of fiberglass ducts can help designers, engineers, and purchasing personnel make more scientific and rational decisions, ensuring the safety, stability, and energy efficiency of projects.