1. The material for making the air duct is the basic condition to ensure the cleanliness of the air conditioner
Material selection. Clean air-conditioning system air ducts are generally processed with galvanized steel sheets. The galvanized steel sheet should be of high quality, the standard of galvanized layer should be >314g/㎡, and the coating should be uniform, without peeling and oxidation. Hangers, reinforcement frames, connecting bolts, washers, air duct flanges, and rivets should all be galvanized parts. Flange pads should...