What is the primary purpose of lining a chute in HVAC systems?

The primary purpose of lining a chute in HVAC systems is to reduce wear on the fitting. When air flows through a chute, especially in systems with high-velocity air, the internal surfaces can experience significant abrasion from dust, particles, and other contaminants carried by the airflow. By lining the chute, usually with a material that can withstand this wear, the lifespan of the fitting is extended. The lining acts as a buffer, minimizing damage to the original material of the chute and reducing the frequency of repairs or replacements needed. This is particularly crucial in maintaining efficient airflow and ensuring the overall effectiveness of the HVAC system.