1. Before installation, ensure that the basic engineering has been completed
The installation of the air duct must be carried out after the completion of these basic projects; the appearance quality inspection should be carried out before installation, and the dust on the inner and outer surfaces and the sundries in the pipe should be removed.

△ Metal air duct installation requirements
(1) Air duct extension and hoisting. First of all, according to the specific conditions of the site, select two reliable hanging points on the beam and column, then hang the chain or pulley, and bind the air duct firmly with hemp rope. When lifting, when the air duct is 200~300mm above the ground, stop hoisting, carefully check the stress point of the chain or pulley and the rope binding the air duct, whether the rope buckle is firm, and whether the ce

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In recent years, phenolic aluminum foil composite air ducts have emerged and developed rapidly, showing their talents in ventilation projects with their unique advantages. It has been applied in many important engineering buildings.

A ventilation system in a building may perform only one or a few of these tasks. Among them, the function of using ventilation to remove indoor waste heat and humidity is limited, and it is limited by the state of the outdoor air.

1. Scope of application
This construction method is applicable to the rubber and plastic insulation construction of rectangular metal air ducts in various types of air-conditioning and ventilation systems.

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The main function of ventilation and air conditioning is to provide the oxygen needed for human breathing, dilute indoor pollutants or odors, remove pollutants generated by indoor processes, remove indoor waste heat or humidity, and provide air needed for indoor combustion. It is mainly used in households, commercial, hotel, school and other buildings.

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4.Implement quality inspection standards and acceptance specifications In order to ensure that the project reaches an excellent level, the quality inspection during construction should be in accordance with the "Code for Construction and Acceptance of Ventilation and Air Conditioning Engineering" (GB50243-2002) and professional construction atlas and the requirements of the construction party conduct.

1. The internal sundries were not removed before the air duct was installed
The internal and external sundries should be removed before the air duct is installed, and the cleaning and finished products should be done well. After construction, the pipe opening should be blocked in time.

The handling and loading and unloading of the air duct should be handled with care to prevent damage to the finished product. For the construction in the air duct, clean work clothes, work gloves, and work caps must be available.