Check the quality of materials: Ensure that the materials used meet the quality requirements and have factory certification or quality appraisal documents. For sheet metal, the surface should be checked for flatness, uniform thickness, no unevenness or obvious indentation, and there should be no cracks, sand holes, scars, burrs, or rust. For steel materials, it should be ensured that they are of equal shape, uniform, and free from defects such as cracks, bubbles, and cavities that affect quality.

制作金属风管和管件：风管和配件表面应平整，圆弧均匀，纵向接缝应错开。咬口缝应紧密，宽度均匀。焊缝应做外观检查，不应有气孔、砂眼、夹渣、裂缝等缺陷，焊接后钢板的变形应矫正。风道系统内所有直角转弯处均安装消声弯头，消声弯头内设镀锌铁板导流片。

Making metal air ducts and fittings: The surface of the air ducts and fittings should be flat, with even arcs, and longitudinal joints should be staggered. The bite seam should be tight and uniform in width. The weld seam should undergo visual inspection, and there should be no defects such as pores, sand holes, slag inclusions, cracks, etc. The deformation of the steel plate after welding should be corrected. All right angle turns in the air duct system are equipped with silencing elbows, and galvanized iron plate guide vanes are installed inside the silencing elbows.

风道加固：矩形风管边长大于或等于630mm和保温风管边长大于或等于800mm，其管段长度在1.2m以上的均应采取加固措施。

Air duct reinforcement: For rectangular air ducts with a side length greater than or equal to 630mm and insulated air ducts with a side length greater than or equal to 800mm, reinforcement measures should be taken for duct sections with a length of more than 1.2m.

外观质量检查：风管咬口缝结合要紧密，咬口缝宽度要均匀。外观检查要包括风管和配件的表面平整度，圆弧的均匀度，纵向接缝的错开情况等。

Appearance quality inspection: The bite seam of the air duct should be tightly bonded, and the width of the bite seam should be uniform. The appearance inspection should include the surface flatness of the air duct and accessories, the uniformity of the arc, and the misalignment of the longitudinal joints.

安装方向调整：风道的安装方向应平直，主风道安装不直度小于等于1.5mm/米，不平度小于等于1mm/米。

Installation direction adjustment: The installation direction of the air duct should be straight, and the installation unevenness of the main air duct should be less than or equal to 1.5mm/m, and the unevenness should be less than or equal to 1mm/m.

保温层制作与安装：保温层一般由聚苯乙烯泡沫板制成，其密度为40kg/立方米，厚度35mm。保温层边部接合部位应采用梯台或榫槽结构，用树脂粘贴，外表面用铝箔布裹住，用热敏胶带粘贴严密。保温层制作完成后，需要使用铝箔布进行包裹。

Fabrication and installation of thermal insulation layer: the thermal insulation layer is generally made of polystyrene foam board, with a density of 40kg/m3 and a thickness of 35mm. The edge joint of the insulation layer should adopt a ladder or tenon groove structure, which should be pasted with resin. The outer surface should be wrapped with aluminum foil cloth and tightly pasted with thermosensitive tape. After the insulation layer is completed, it needs to be wrapped with aluminum foil cloth.

风道连接：通风管道一般采用机械咬口的方式进行连接，以保证接口的严密性。在接口处可以使用橡胶密封条进行密封。

Air duct connection: Ventilation ducts are generally connected by mechanical biting to ensure the tightness of the interface. Rubber sealing strips can be used at the interface for sealing.

调试与验收：在完成通风管道的安装后，需要进行调试和验收。调试时需要检查通风管道的气密性，确保没有漏气现象。同时还需要检查通风管道的通风效果，确保满足设计要求。在验收过程中需要对安装质量进行检查，确保符合规范要求。

Debugging and acceptance: After completing the installation of the ventilation pipeline, debugging and acceptance are required. During debugging, it is necessary to check the airtightness of the ventilation pipeline to ensure that there is no air leakage. At the same time, it is necessary to check the ventilation effect of the ventilation ducts to ensure that they meet the design requirements. During the acceptance process, it is necessary to inspect the installation quality to ensure compliance with regulatory requirements.