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積塵：空氣中的灰塵、顆粒物等會不斷在通風管道內沉積，隨著時間的推移，積塵量會逐漸增加。這不僅會影響通風效果，降低空氣質量，還可能成為細菌、霉菌等微生物滋生的溫床，對人體健康造成威脅。

Dust accumulation: Dust, particulate matter, etc. in the air will continuously deposit in the ventilation duct, and over time, the amount of dust accumulation will gradually increase. This not only affects ventilation effectiveness and reduces air quality, but may also become a breeding ground for bacteria, mold, and other microorganisms, posing a threat to human health.

滋生微生物：通風管道內相對潮濕且黑暗的環境適合微生物生長。長期積累的灰塵和適宜的溫濕度條件會促使細菌、霉菌、病毒等微生物大量繁殖。這些微生物可能會隨著通風氣流傳播到室內各個角落，引發呼吸道疾病、過敏反應等健康問題。

Microbial growth: The relatively humid and dark environment inside ventilation ducts is suitable for microbial growth. Long term accumulation of dust and suitable temperature and humidity conditions can promote the proliferation of bacteria, molds, viruses, and other microorganisms. These microorganisms may spread to various corners of the room with ventilation airflow, causing health problems such as respiratory diseases and allergic reactions.

腐蝕：如果通風管道所處環境存在腐蝕性氣體、水汽或濕度較高，管道材質可能會發生腐蝕。尤其是金屬材質的通風管道，容易生銹、穿孔，影響管道的結構強度和密封性，導致通風效率下降，甚至可能出現漏風現象。

Corrosion: If there are corrosive gases, water vapor, or high humidity in the environment where the ventilation duct is located, the material of the duct may corrode. Especially metal ventilation ducts are prone to rusting and perforation, which affects the structural strength and sealing of the ducts, leading to a decrease in ventilation efficiency and even the possibility of air leakage.

漏風：通風管道的連接部位可能會因長時間使用而出現松動、密封件老化等問題，從而導致漏風。此外，管道受到外力撞擊、磨損或腐蝕穿孔也會造成漏風。漏風會使通風系統的能耗增加，影響通風效果，無法滿足室內環境的通風需求。

Air leakage: The connection parts of ventilation ducts may become loose or the seals may age due to prolonged use, leading to air leakage. In addition, external impact, wear, corrosion, or perforation of pipelines can also cause air leakage. Air leakage can increase the energy consumption of the ventilation system, affect the ventilation effect, and fail to meet the ventilation needs of indoor environments.‘

堵塞：除了積塵外，通風管道內還可能會因異物進入、管道內的部件損壞脫落等原因造成堵塞。例如，在施工過程中不慎遺留的雜物、昆蟲或小動物進入管道后死亡形成的堵塞等。堵塞會阻礙空氣流通，使通風系統的阻力增大，風機負荷增加，甚至可能導致通風系統無法正常運行。

Blockage: In addition to dust accumulation, there may also be blockages in ventilation ducts due to foreign objects entering or components inside the ducts being damaged or detached. For example, blockages caused by debris, insects, or small animals that accidentally enter the pipeline during construction and die. Blockage can hinder air circulation, increase the resistance of the ventilation system, increase the load on the fan, and may even cause the ventilation system to malfunction.

保溫性能下降：對于有保溫層的通風管道，隨著時間的推移，保溫材料可能會老化、破損或受潮，導致保溫性能降低。這會使通風管道表面出現結露現象，不僅浪費能源，還可能會損壞管道及周圍的建筑結構，同時也會影響室內的舒適度。

Decreased insulation performance: For ventilation ducts with insulation layers, over time, the insulation material may age, break, or become damp, leading to a decrease in insulation performance. This will cause condensation on the surface of the ventilation duct, which not only wastes energy but may also damage the duct and surrounding building structures, while also affecting indoor comfort.

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