Fiberglass ducts, a common type of ventilation duct in HVAC systems, are widely used in commercial buildings, public facilities, and industrial plants due to their lightweight, good insulation, convenient installation, and significant overall energy-saving effects. To ensure long-term stable operation and extend the service life of the system, proper maintenance is essential. Scientific maintenance not only maintains duct performance but also reduces operating energy consumption and improves overall system reliability.

First, routine inspections are a crucial foundation for fiberglass duct maintenance. During operation, the duct surface should be regularly checked for damage, cracks, deformation, or moisture, with particular attention to joints, mounting supports, and equipment connection areas. These locations are prone to problems due to vibration or long-term stress; any issues should be repaired promptly to avoid affecting the system's sealing and insulation performance.

Second, maintaining system sealing is a key aspect of maintenance. During long-term operation, if the joint sealing material ages or the adhesive layer loosens, air leakage may occur, reducing air supply efficiency and increasing energy consumption. Therefore, flange connections, tape seals, and interface bonding should be inspected regularly, and reinforcement or replacement of sealing materials should be carried out as necessary to ensure the system's airtightness meets design requirements.

Moisture control is also a key maintenance focus. Although fiberglass ducts generally have some moisture resistance, condensation may still occur in high-humidity environments or under conditions of large temperature differences. The integrity of the insulation layer should be checked to prevent external moisture from entering the material. If localized dampness is found, the protective layer should be repaired promptly to prevent performance degradation or material aging.

Cleanliness and maintenance are also crucial for ensuring air quality. Dust or contaminants may accumulate inside the ducts during long-term operation, affecting air delivery quality. Therefore, a reasonable cleaning cycle should be established based on the operating environment, and professional cleaning should be performed when necessary to ensure smooth airflow, reduce system resistance, and improve operational efficiency.

Regarding structural stability, hangers, supports, and fixing devices should be checked regularly for security to prevent duct sagging or deformation due to loosening. Especially in large commercial buildings or industrial projects, where duct systems have large spans, structural stability directly affects safe operation and should be given sufficient attention. In addition, environmental management also affects the lifespan of fiberglass ducts. Prolonged operation in high humidity, high corrosion, or high temperature environments should be avoided as much as possible; additional protective measures should be taken when necessary. Properly controlling system operating parameters, such as airflow, pressure, and temperature, also helps reduce material fatigue and extend service life.

Overall, the maintenance of fiberglass duct systems mainly includes daily inspections, sealing maintenance, moisture control, cleaning, and structural safety checks. Through standardized maintenance, the system's lifespan can be effectively extended, maintaining good energy efficiency and reducing operating costs. For building operators, establishing a sound maintenance management system is crucial for ensuring the long-term stable operation of fiberglass duct systems.