What types of ducts are found in HVAC systems?

What types of ducts are found in HVAC systems?

• A. Horizontal and Vertical
• B. Rigid and Flexible
• C. Rectangular and Oval
• D. Insulated and Uninsulated

Answer: (B)

Ducts in HVAC systems are categorized by how they’re built and installed: rigid versus flexible. Rigid ducts are solid metal components that hold their shape and provide a smooth interior surface, which helps airflow with minimal leakage and is sturdy for longer, straight runs. Flexible ducts, on the other hand, use a spiral-wound core wrapped in a flexible material, allowing them to bend around obstacles and fit into tight spaces, though they require careful installation to avoid kinks, crushes, or leaks. The other choices describe orientation, shape, or insulation status, rather than the main construction types, so they don’t capture the standard classification as clearly as rigid and flexible.

Ducts in HVAC systems are categorized by how they’re built and installed: rigid versus flexible. Rigid ducts are solid metal components that hold their shape and provide a smooth interior surface, which helps airflow with minimal leakage and is sturdy for longer, straight runs. Flexible ducts, on the other hand, use a spiral-wound core wrapped in a flexible material, allowing them to bend around obstacles and fit into tight spaces, though they require careful installation to avoid kinks, crushes, or leaks. The other choices describe orientation, shape, or insulation status, rather than the main construction types, so they don’t capture the standard classification as clearly as rigid and flexible.