1, the price is higher: compared with some traditional materials, EPP air duct has higher cost, which may cause economic pressure to users.

2. Poor heat resistance: EPP air duct has poor heat resistance. If it is used in a high temperature environment for a long time, it may cause problems such as deformation, so it cannot be used in some high temperature occasions.

3. Limited strength: Although EPP air duct has good elasticity, it also means that its bearing capacity is not as good as that of traditional metal and plastic air ducts, so it needs to be designed and installed according to the specification requirements.