What is the main reason ductwork must be properly sealed and supported?

What is the main reason ductwork must be properly sealed and supported?

• A. To prevent leaks caused by sagging joints
• B. To improve wall color matching
• C. To reduce weight
• D. To increase air velocity

Answer: (A)

Sealing and supporting ductwork helps air follow the intended path and stay in the system. When joints aren’t sealed or ducts sag, conditioned air leaks out into cavities instead of reaching the rooms, which wastes energy and reduces the actual airflow you get where you need it. That leakage can force the blower to work harder, raise energy use, and compromise comfort, while proper support keeps joints from pulling apart with vibration or temperature changes, maintaining the seal over time. This focus on preventing leaks from sagging joints is why sealing and supporting is essential, whereas wall color, weight, or simply increasing velocity aren’t the primary goals.

Sealing and supporting ductwork helps air follow the intended path and stay in the system. When joints aren’t sealed or ducts sag, conditioned air leaks out into cavities instead of reaching the rooms, which wastes energy and reduces the actual airflow you get where you need it. That leakage can force the blower to work harder, raise energy use, and compromise comfort, while proper support keeps joints from pulling apart with vibration or temperature changes, maintaining the seal over time. This focus on preventing leaks from sagging joints is why sealing and supporting is essential, whereas wall color, weight, or simply increasing velocity aren’t the primary goals.