What is a common cause of airflow restrictions in duct systems?

Dirty air filters are a common cause of airflow restrictions in duct systems because they can become clogged with dust, debris, and other particles over time. When the filter is blocked, the system struggles to draw air through it, which can significantly reduce airflow and impact the efficiency of the HVAC system. This restriction can lead to increased energy consumption, uneven heating or cooling in different areas of a building, and unnecessary strain on the equipment, potentially leading to breakdowns or decreased lifespan of the system.

Proper maintenance of air filters is crucial to ensure optimal airflow and overall system performance. Regularly checking and replacing or cleaning filters according to the manufacturer's recommendations helps maintain efficiency, prolong the life of the equipment, and improve indoor air quality.