1、消声性能；
1. Anechoic performance;
镀锌薄钢板风管：无消声性能，自身震动会产生声音，必须加装消声器。
Galvanized steel sheet air duct: no sound attenuation performance, its vibration will produce sound, must be equipped with muffler.
无机玻璃钢风管：无消声性能，隔声性能优于镀锌薄钢板风管，必须加装消声器。
Inorganic glass fiber reinforced plastic air duct: no sound attenuation performance, sound insulation performance is better than galvanized steel sheet air duct, must be equipped with muffler.
复合玻纤板风管：其管壁是一种多孔性吸声材料，可省去专用消声器。
Composite fiberglass board air duct: its wall is a kind of porous sound-absorbing material, so special muffler can be omitted.
2、保温性能：
2. Thermal insulation performance:
镀锌薄钢板风管：导热系数很大(为60.4 W/m?K) ，无保温性能，必须另外加包保温层及保护层。
Galvanized steel sheet air duct: the thermal conductivity is very large (60.4 w / M? K), and it has no thermal insulation performance. Therefore, it is necessary to add thermal insulation layer and protective layer.
复合玻纤板风管：导热系数小(平均温度24℃时小于1 W/m?K) ，有一定保温性能，不加装保温。
Composite fiberglass board air duct: small thermal conductivity (less than 1 W / M? K when the average temperature is 24 ℃), with certain thermal insulation performance, without adding thermal insulation.
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3、防火性能
3. Fire performance
镀锌薄钢板风管：不燃，但其真正的防火性能视保温层而定。
Galvanized steel sheet air duct: non combustible, but its real fire performance depends on the insulation layer.
无机玻璃钢风管：同镀锌薄钢板风管。
Inorganic glass fiber reinforced plastic air duct: the same as galvanized steel sheet air duct.
复合玻纤板风管：外层为铝箔，以不燃性玻璃纤维棉板为基材，防火性能好。
Composite fiberglass board air duct: the outer layer is aluminum foil, and the non combustible glass fiber cotton board is used as the base material, with good fire resistance.
4、防潮性能
4. Moisture resistance
镀锌薄钢板风管：易受潮腐蚀生锈。
Galvanized steel sheet air duct: easy to be affected by moisture, corrosion and rust.
无机玻璃钢风管：受原料配比的制约，其防潮性能的稳定性较差。
Inorganic glass fiber reinforced plastic air duct: restricted by the proportion of raw materials, the stability of its moisture-proof performance is poor.
复合玻纤板风管：无易腐材料和部件，但因其为多孔材料，在长期潮湿环境下不建议使用。
Composite fiberglass board air duct: no perishable materials and components, but due to its porous material, it is not recommended to use in long-term humid environment.
5、强度
5. Strength
镀锌薄钢板风管：强度较高，抗静压能力强。
Galvanized steel sheet air duct: high strength, strong static pressure resistance.
无机玻璃钢风管：强度较高，抗冲击能力脆弱。
Inorganic glass fiber reinforced plastic air duct: high strength, weak impact resistance.
复合玻纤板风管：能满足一般通风空调的承压要求，高可承受风压1500Pa。
Composite fiberglass board air duct: it can meet the pressure bearing requirements of general ventilation and air conditioning, and can withstand wind pressure of 1500pa.

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