Flex duct should be supported at least every how many feet?

Flex duct should be supported at least every 5 feet to ensure proper airflow and prevent sagging or bending, which can restrict the passage of air and reduce the system's efficiency. Adequate support helps maintain the integrity of the duct system, preventing kinks that could lead to pressure drops and decreased performance.

In addition to mechanical stability, this support requirement also contributes to longevity by reducing wear and tear on the duct material. Properly supported ducts are less prone to damage from environmental factors and are easier to maintain. This standard is essential for both residential and commercial installations, where efficient airflow is crucial for comfort and energy savings.