Selecting the correct HVAC duct material is crucial for optimal system performance. Sheet metal ducts offer durability, fire resistance, and easy customization. Fiberglass ducts provide excellent thermal insulation and noise reduction. Flexible ducts are versatile and easily installed in tight spaces. Consider factors such as cost, installation requirements, fire codes, and desired performance to determine the right material for your building. Consulting with an HVAC professional can help ensure that you choose the duct material that best suits your specific needs, promoting efficient airflow, energy savings, and occupant comfort.