Spiral ductwork, known for its efficiency and aesthetic appeal, is popular in modern HVAC systems. Spiral duct cost is more expensive upfront than traditional rectangular ductwork due to its specialized manufacturing process; the long-term benefits often justify the price. These benefits include improved airflow, reduced leakage, and lower energy bills. Additionally, its ease of installation and maintenance can save costs over time. Therefore, while spiral ductwork may have a higher initial cost, its overall value and performance can make it a worthwhile investment.