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What are the common ventilation ducts in the ventilation and air conditioning system? What are their unique features? Recently, netizen \chenyongyi \!

一、鐵皮風管

1、 Iron sheet air duct

1、鐵皮風管優點

1. Advantages of iron sheet air duct

1)強度高，能承受3000Pa的風壓，可滿足高中低壓風系統的使用。

1) It has high strength and can bear the wind pressure of 3000pa, which can meet the use of high, medium and low pressure air systems.

2)可現場加工，運輸成本低，調整方便，不影響工期。

2) It can be processed on site, with low transportation cost, convenient adjustment and no impact on the construction period.

2、鐵皮風管缺點

2. Defects of iron sheet air duct

1)易生銹，使用壽命不長，不利于提高室內空氣品質，在潮濕的環境下，使用壽命只有5-7年，而且過4-5年去看風管內部到處是銹跡斑斑。

1) It is easy to rust, and its service life is not long, which is not conducive to improving indoor air quality. In a humid environment, its service life is only 5-7 years, and after 4-5 years, there are rust spots inside the air duct.

2)漏風率高，能耗大。鐵皮風管由咬口及法蘭連接，其漏風率在10%左右（國家標準允許）。

2) High air leakage rate and large energy consumption. The iron sheet air duct is connected by undercut and flange, and its air leakage rate is about 10% (allowed by national standards).

3)通風噪聲大。鐵皮風管壁薄，在風速和風壓的作用下會產生噪聲。

3) High ventilation noise. The iron sheet air duct has a thin wall, which will produce noise under the action of wind speed and pressure.

4)重量大，增加建筑物荷載。鐵皮風管每平方米重量在10kg以上。

4) Heavy weight increases the load of the building. The iron sheet air duct weighs more than 10kg per square meter.

5)導熱系數高。鐵皮風管采用外保溫，外保溫增加了工程造價，影響了施工工期。如果外保溫不到位或受到破損，就會產生冷橋。冷凝水破壞吊頂，會損壞下面的物件。

5) High thermal conductivity. The iron sheet air duct adopts external insulation, which increases the project cost and affects the construction period. If the external insulation is not in place or damaged, a cold bridge will occur. Condensate damages the ceiling and will damage the objects below.

6)制作安裝周期長。鐵皮風管要采用大型的機械施工，要做咬口和法蘭，速度慢。

6) Long manufacturing and installation cycle. The iron sheet air duct shall be constructed by large-scale machinery, with undercut and flange, and the speed is slow.

7)維護成本高。鐵皮風管經常要維護，進行防銹處理。

7) High maintenance costs. The iron sheet air duct shall be maintained frequently and treated with rust prevention.

8)不美觀。鐵皮風管外保溫后不平整、不美觀。

8) Unsightly. The iron sheet air duct is uneven and unsightly after external insulation.

9)占用吊頂空間。鐵皮風管加上法蘭高度和保溫材料厚度占用了不小的吊頂空間（一般在40-60mm）。

9) Occupy ceiling space. The iron sheet air duct, together with the height of the flange and the thickness of the thermal insulation material, occupies a large ceiling space (generally 40-60mm).

二、鋁箔復合玻纖風管

2、 Aluminum foil composite glass fiber air duct

鋁箔復合玻纖風管直接用鐵皮風管的保溫材料-超細玻璃棉制作而成。1992年就有風管（玻纖風管）進入國內市場，雖然經過了十多年的市場運作，但目前市場份額仍然相當小，甚至有份額萎縮的趨勢。

Aluminum foil composite glass fiber air duct is directly made of ultra-fine glass wool, the thermal insulation material of iron sheet air duct. In 1992, the air duct (glass fiber air duct) entered the domestic market. Although it has been operated for more than ten years, its market share is still quite small, and even has the trend of shrinking.

1、鋁箔復合玻纖風管優點

1. Advantages of aluminum foil composite glass fiber duct

1)吸聲。因其直接用超細玻璃棉制作，材質比較松散，有較好的吸聲性能。

1) Sound absorption. Because it is directly made of superfine glass wool, the material is relatively loose and has good sound absorption performance.

2)重量輕。每平方米重量3kg左右。

2) Light weight. The weight per square meter is about 3kg.

2、但與鐵皮風管相比缺點也很多

2. However, compared with iron sheet air duct, it also has many disadvantages

1)強度差。因直接用超細玻璃棉制作，承壓能力差，只能在低壓、小風管使用。成品保護要求高，容易被后期的水電和裝修工程弄破。不能清洗。

1) Strength difference. Because it is directly made of ultra-fine glass wool, it has poor pressure bearing capacity and can only be used in low-pressure and small air ducts. The finished products have high requirements for protection and are easy to be damaged by later water and electricity and decoration projects. Cannot be cleaned.

2)怕潮濕。超細玻璃棉的吸水率高，如果表面封閉不到位，特別是在開槽后，會吸收大量的水分，降低保溫性能和強度。

2) Fear of humidity. Ultra fine glass wool has high water absorption. If the surface is not sealed in place, especially after slotting, it will absorb a lot of water and reduce the thermal insulation performance and strength.

3)纖維易飛散。超細玻璃棉如果表面封閉不到位，特別是在開槽后，會導致纖維飛散，影響人體健康。

3) Fibers are apt to fly away. If the surface of superfine glass wool is not sealed in place, especially after slotting, the fiber will fly away and affect human health.

4)風阻大。表面粗糙度達0.9-1.1mm，一般要求機組功率提高10%，增加能耗。

4) High wind resistance. The surface roughness reaches 0.9-1.1mm. Generally, the unit power is required to be increased by 10% to increase energy consumption.

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