Rectangular elbow ductwork is primarily used to achieve what?

Rectangular elbow ductwork is primarily used to achieve what?

• A. It increases pressure loss
• B. It reduces pressure loss and helps distribute airflow
• C. It filters air
• D. It seals joints

Answer: (B)

Rectangular elbow ductwork is all about turning airflow without causing unnecessary resistance, while guiding the air toward different branches for even distribution. The elbow is shaped to keep as much of the duct’s cross-sectional area as possible and to smooth the flow through the bend, which minimizes turbulence and the pressure drop that comes with a turn. That combination—changing direction efficiently and helping deliver air to multiple paths—improves overall system performance. Elbows don’t filter air, and sealing joints is a separate part of the installation, though proper sealing is still important to prevent leaks.

Rectangular elbow ductwork is all about turning airflow without causing unnecessary resistance, while guiding the air toward different branches for even distribution. The elbow is shaped to keep as much of the duct’s cross-sectional area as possible and to smooth the flow through the bend, which minimizes turbulence and the pressure drop that comes with a turn. That combination—changing direction efficiently and helping deliver air to multiple paths—improves overall system performance. Elbows don’t filter air, and sealing joints is a separate part of the installation, though proper sealing is still important to prevent leaks.