Glass fiber ducts are widely used in central air conditioning, ventilation systems, and public buildings due to their advantages of thermal insulation, sound insulation, and lightweight. Unlike traditional metal ducts, glass fiber ducts have certain specificities in material structure and installation methods. Improper construction can easily affect the air tightness, thermal insulation performance, and service life of the system. Therefore, mastering the precautions for the construction and installation of glass fiber ducts is crucial to ensuring the stable operation of the ventilation system.

 1. Key points of preparation before construction

 1. Clarify design parameters and construction conditions

Before construction, it is necessary to carefully check the design drawings of the duct system, clarifying the duct dimensions, air volume levels, pressure levels, and installation locations. Fiberglass ducts are commonly used in medium and low-pressure ventilation systems, and their applicable operating conditions need to be confirmed before construction to avoid overpressure operation.

 2. Material mobilization and inspection

After the fiberglass duct board enters the site, its appearance should be inspected for completeness, and the surface coating should be checked for flatness, without any damage or delamination. At the same time, it should be confirmed that the material specifications are consistent with the design requirements to prevent any impact on subsequent installation quality due to specification deviations.

 II. Precautions for Duct Fabrication and Cutting

 1. Cutting size and precision control

During the manufacturing process of fiberglass ducts, the cutting dimensions should be strictly adhered to as per the design drawings. The cuts should be straight and free of burrs to avoid poor splicing or air leaks due to dimensional deviations.

 2. Processing of plate edges and corners

After cutting the duct board, the edges and corners should be properly treated to ensure that the splicing parts are neatly fitted, which is beneficial to improving the overall air tightness and structural stability of the duct.

 III. Key points of splicing and sealing construction

 1. Standard splicing method

Glass fiber ducts are typically spliced using specialized adhesive or mechanical connection methods. During splicing, it is important to ensure that the joints are tightly fitted to avoid gaps. Adhesive connections should be evenly applied to ensure bonding strength.

 2. Joint sealing treatment

The duct seams are key components that affect the system's air leakage rate. During construction, all splicing seams should be sealed, and if necessary, sealing rubber strips or cladding materials can be added to ensure the overall air tightness of the duct.

 IV. Installation and Fixing Requirements for Supports and Hangers

 1. Control of support and hanger spacing

The fiberglass duct has a relatively light self-weight, but it still requires reasonable installation of supports and hangers. The spacing between supports and hangers should be determined based on the size and direction of the duct, to prevent sagging or deformation of the duct due to excessive spacing.

 2. Prevent local stress concentration

During installation, excessive localized stress on fiberglass ducts should be avoided. Support and hanging points should be evenly distributed to ensure balanced stress on the ducts, which will help extend their service life.

 V. Precautions for system insulation and protection

 1. Insulation characteristics of fiberglass ducts

Glass fiber ducts inherently possess a certain level of insulation performance, but in special working conditions or high-demand scenarios, it is still necessary to incorporate additional insulation or protective measures in conjunction with system design.

 2. Moisture-proof and damage-proof measures

When installing in humid environments or outdoor areas, attention should be paid to moisture-proof treatment to prevent moisture from infiltrating into the internal structure of the air duct. Additionally, during construction, hard objects should be avoided from impacting the surface of the air duct to prevent damage to the cladding layer.

 VI. Key points of system debugging and acceptance

 1. Inspection after installation

After the installation of the air duct system is completed, a comprehensive inspection of the air duct routing, connection parts, and fixation should be conducted to confirm that there are no obvious deformations, looseness, or air leaks.

 2. Operation, debugging, and acceptance

During the system commissioning phase, it is necessary to inspect the air volume, air pressure, and noise levels to ensure that the fiberglass duct system meets the design and specification requirements. Any identified issues should be rectified promptly before acceptance.

 VII. Common Construction Issues and Avoidance Suggestions

 Poor splicing: Strictly control cutting accuracy and splicing process

 Air leakage phenomenon: strengthen joint sealing treatment

 Deformation of air duct: Reasonably set up supports and hangers and control the stress

By standardizing construction practices, the occurrence of the aforementioned issues can be effectively avoided.

In summary, the precautions for the construction and installation of fiberglass ducts are integrated throughout the entire process, including material acceptance, fabrication and splicing, installation and fixation, as well as system commissioning. Only by strictly adhering to construction specifications can the comprehensive advantages of fiberglass ducts in terms of insulation, sound insulation, and energy saving be fully utilized, ensuring the long-term, safe, and stable operation of the ventilation system.