What effect do blockages in ductwork have on HVAC performance?

• A. They increase system efficiency
• B. They cause uneven heating or cooling
• C. They improve air quality
• D. They eliminate energy consumption

Answer: (B)

Blockages in ductwork significantly disrupt the airflow within an HVAC system, leading to uneven heating or cooling in different areas of a building. When ducts are obstructed, air cannot flow freely, which causes some rooms to receive inadequate airflow while others may be overwhelmed with hot or cold air. This results in discomfort for occupants and can create hot or cold spots that make temperature control difficult.

Additionally, uneven air distribution can lead to increased wear and tear on the system, as it works harder to maintain the desired temperature, ultimately affecting its efficiency and effectiveness. Therefore, recognizing and addressing ductwork blockages is critical for maintaining consistent climate control and overall HVAC performance.