Ventilation accessories and spiral air ducts are generally arranged in the following forms

a)通風柵的安裝形式；主風管天花板風柵圖1通風柵的安裝形式

a) Installation form of air grille; ceiling air grille of main air duct Figure 1 installation form of air grille

b)布風器的安裝形式；250螺旋風管角鋼支架L30×30×3軟管天花板布風器抱箍圖2布風器的安裝形式

b) Installation form of air distributor: 250 spiral air duct angle steel support L30 × 30 × 3 hose ceiling air distributor hoop Figure 2 installation form of air distributor

c)抽風頭的安裝形式；扁鐵25×3甲板抽風頭H抱箍單層螺旋風管L30×30×3吊架圖3抽風頭的安裝形式

c) Installation form of suction head: flat iron 25 × 3 deck suction head h hoop single-layer spiral air pipe L30 × 30 × 3 hanger Figure 3 installation form of suction head

d)菌形通風筒的安裝形式；

d) The installation form of the mushroom ventilator;

1）當菌形通風筒的安裝高度H＜900時，其安裝形式見圖4。H＜900甲板圖4菌形通風筒的安裝形式

1) When the installation height of the mushroom ventilation tube h ＜ 900, its installation form is shown in Figure 4. H ＜ 900 deck Figure 4 installation form of mushroom vent

2）當菌形通風筒安裝高度H≥900時，應加肘板，其安裝形式見圖5。H≥900甲板圖5菌形通風筒的安裝形式

2) When the installation height of the mushroom ventilation pipe h ≥ 900, the bracket plate shall be added, and the installation form is shown in Figure 5. H ≥ 900 deck Figure 5 installation form of mushroom vent

3）當通風筒連接風機時，菌形通風筒安裝應加肘板。甲板H1H圖6菌形通風筒的安裝形式

3) When the ventilator is connected with the ventilator, the bracket plate shall be added for the installation of the mushroom ventilator. Figure 6 installation form of mushroom vent in deck h1h

e)壁式通風柵的安裝形式；甲板天花板甲板≥60≥300圖7壁式通風柵的安裝形式

e) Installation form of wall type ventilation grid; deck ceiling deck ≥ 60 ≥ 300 Figure 7 installation form of wall type ventilation grid

f)回風防火風閘的安裝形式（垂直、水平見圖8）；垂直安裝防火風閘防火風閘鋼圍壁鋼圍壁甲板水平安裝防火風閘天花板甲板≥300.

f) Installation form of return air fire damper (see Fig. 8 for vertical and horizontal); vertical installation of fire damper, fire damper, steel enclosure, steel enclosure, and horizontal installation of fire damper ceiling deck ≥ 300