The answer to 'how to maintain ductwork' is to regularly inspect, clean, and repair your home's ductwork to ensure efficient and safe HVAC operation. This includes visually inspecting for any damage, leaks, or debris buildup, and using specialized tools and methods to thoroughly clean the ducts when needed.
It's recommended to have your ductwork professionally inspected and cleaned every 3-5 years, or more frequently if you have pets, live in a dusty environment, or notice reduced airflow. DIY duct cleaning can be done, but requires caution and the right equipment to avoid damage. If you discover any major issues like large holes, significant mold growth, or structural problems, it's best to call an HVAC professional for repairs.