First of all, the ventilation duct has good fire resistance: the current common problem is that the combustion performance of the finished ventilation duct has not been tested by the relevant department, and the combustion performance and pipe wall thickness of some ventilation duct materials do not meet the requirements. Secondly, the cost is low: compared with the traditional brick ventilation duct, the ventilation duct can save the project cost; compared with the traditional brick ventilation duct, the magnesite ventilation duct has light weight and high strength, which can greatly reduce the bearing load of the building; Flexible design: the size of the ventilation pipe can be adjusted at any time according to the size of the reserved hole; Fifth, the design is unique: flue gas check valve and fire isolation door are installed on the opening of the ventilation pipe, which can prevent cross smell and cross fire; Simple construction: increased indoor space, good airtightness, no smoke, no odor, can greatly change the indoor environment.

對于比較復雜的民用建筑，在設計階段，各工種應該協商好空間分隔，定出每種管道的標高范圍。

For more complex civil buildings, in the design phase, each type of work should negotiate space separation and determine the elevation range of each type of pipe.

一般情況下不得越出給自己規定的界限。遇有個別管段要越界時應與其他工程協商。其次解決各種通風管道相碰及協調的原則，一般為：“小管讓大管，有壓讓無壓”。例如，自來水管與風管相撞，則應當自來水管拐彎。

In general, you should not exceed the limits set for yourself. In case of pipeline section crossing the boundary, it shall negotiate with other projects. Secondly, the principle to solve the collision and coordination of various ventilation pipes is generally: "small pipes give way to large ones, and pressure gives way to non pressure". For example, if the water pipe collides with the air pipe, the water pipe should turn.

冷、熱水管與下水管相碰，則應改變冷、熱水管道。再有施工前應設備總管的工程師，將各工種的管線，單線畫在一張的平面圖上。

If the cold and hot water pipes collide with the sewer pipe, the cold and hot water pipes shall be changed. Before construction, the engineer in charge of equipment shall draw the pipelines and single lines of various types of work on a plan.

每種管道用一種彩色筆。在各交點處綜合其標高，看是否有矛盾之處，及時發現，將問題解決在安裝之前。為了減少投資，節省空間，降低層高，有些敷設無坡度要求的管道，可以穿梁敷設(如自來水管道，消防噴灑干管等)。

One color pen for each type of pipe. The elevation of each intersection shall be integrated to see if there is any contradiction, and the problem shall be solved before installation. In order to reduce investment, save space and reduce floor height, some pipes without slope requirements can be laid through beams (such as water supply pipes, fire sprinkler main pipes, etc.).

山東廚房排煙設備通風管道從建筑結構設計來看由于有主、副煙道之分是不能隨意橫向改動的，否則會影響排煙并有倒灌的可能，將煙道口上下移動則不會有影響。再有就是特別是飯店的通風管道安裝，在通風管道的選擇上更要注意，好的通風管道具有非常多的優勢，使用的全部都是不銹鋼材質的通風管道一點是看煙機的形式，如果是西式煙機一般煙道的走向為垂直向上，外加不銹鋼煙道裝飾板，煙道口可改入吊頂內，如果是中式煙機由于煙道導管外一般無裝飾板，則煙道口需改在吊頂下適當位置，以便煙道導管經裝飾板或從煙機吊柜內同煙機連接。

From the perspective of architectural structure design, the ventilation duct of smoke exhaust equipment in Shandong kitchen can not be changed horizontally at will due to the difference between main flue and auxiliary flue, otherwise it will affect the smoke exhaust and have the possibility of back pouring. Moving the flue mouth up and down will not have an impact. In addition, especially for the installation of ventilation ducts in hotels, we should pay more attention to the selection of ventilation ducts. Good ventilation ducts have many advantages. All the ventilation ducts made of stainless steel are in the form of flue gas fans. For western style flue gas fans, the general flue direction is vertical upward, and stainless steel flue decorative plates are added. The flue opening can be changed into the ceiling, If there is generally no decorative plate outside the flue duct of the Chinese type flue gas turbine, the flue opening shall be changed to an appropriate position under the ceiling so that the flue duct can be connected to the flue gas turbine through the decorative plate or from the flue gas turbine cabinet.