What are the classifications of air conditioning ducts?

Air conditioning ducts can be classified according to different aspects such as material, shape and use, and the common classification is as follows: 1. Material classification: metal air duct, plastic air duct, composite air duct, etc. 2. Shape classification: circular duct, rectangular duct, oval duct, flat duct, etc. 3. Usage classification: ventilation pipes, air conditioning pipes, smoke exhaust pipes, sound insulation pipes, etc. 4. System classification: fresh air system duct, return air system duct, mixed system duct, etc. 5. Classification of installation methods: hoisting air duct, wall-mounted air duct, ground air duct, etc. 6. Cylinder classification: single-pipe air duct, double-pipe air duct and multi-pipe air duct. 7. Enclosure classification: common enclosure air duct, thermal insulation enclosure air duct, fireproof enclosure air duct, etc.