Flexible fabric ducts are a type of air distribution system commonly used in heating, ventilation, and air conditioning (HVAC) systems. They consist of a flexible, air-permeable fabric material that is stretched over a metal or plastic frame. The fabric ducts can be easily bent and shaped to fit into tight spaces and around obstacles, making them a popular choice for retrofit and renovation projects. They are also lightweight, easy to install, and can be used in both commercial and residential buildings.

The lifespan of a flexible fabric duct depends on several factors, including the quality of the materials used, the frequency of use, and the conditions in which it is installed.
On average, a well-made flexible fabric duct can last for about 10-15 years. However, with proper maintenance and care, it can last up to 20 years. Factors that can shorten the lifespan include exposure to UV light, exposure to high temperatures, exposure to chemicals, and improper installation. To extend the life of flexible duct, it is important to keep it clean and free of debris, and to repair any damages as soon as they are noticed.