In high performance applications, ductwork is sized to maintain air speeds between 200 and 300 feet per second.

• A. True
• B. False
• C. Not sure
• D. N/A

Answer: (A)

High-performance duct systems balance how fast air moves through the ducts with how much air you can push, how much energy it takes, and how well heat is removed. Designers target a velocity window because too-fast air wastes energy and creates excess pressure losses and noise, while too-slow air fails to move enough mass for effective cooling. Keeping the air speed in a defined range ensures enough cooling capacity without excessive friction losses or noise.

In many high-performance applications, a velocity around 200 to 300 feet per second represents a practical compromise: it provides substantial mass flow to remove heat efficiently while keeping pressure drop and noise at manageable levels. This range is a design target that reflects the need to maintain performance across operating conditions without over-sizing ducts or overloading the fans.

So the statement aligns with that approach and is considered correct in this context.