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(1) The layout of air ducts should be laid along the wall as far as possible, so that concave-convex roof structure can be formed in the final decoration, which not only keeps the net height of the room, but also shields the air ducts, and can play a better decoration effect;

(2) The duct should be arranged as short as possible, the elbow should not be too many, the turning radius should not be too small, and the abrupt diameter of the duct should be avoided as far as possible in order to reduce the loss of pressure along the pipeline.

(3) The structure of the original building, especially the load-bearing structure, should not be destroyed when the air duct is installed.

(4) When the air duct passes through the wall, the gap around the hole should be filled with elastic material.

(5) In order to reduce noise, it is not advisable to bend sharply at the beginning of the duct (at the connection with the blower). When necessary, guide vanes should be installed at elbows and branch pipes.

(6) The connection of air ducts should be strictly carried out in accordance with the specifications, the sticking should be firm, the laying should be smooth, the binding should be tight, and there should be no sliding, relaxation and fracture, so as to prevent leakage of cold (heat);

(7) The air ducts for conveying condensate-prone air must be installed in accordance with the gradient required by the design.

(8) Installation should be firm. All hangers, supports and brackets shall not interfere with the operation of tuyeres, valves, control systems and check doors, and good rust-proof treatment shall be made.

(9) The installation of fresh air pipes shall comply with the installation regulations of supply air pipes, and shall be installed on a slope according to the design requirements.

(10) The fresh air outlet shall have a rain-proof and filter screen cover, and the installation location shall be in a place where the air is not polluted and easy to repair.