Air Duct Installation and Standards Quiz

Aluminum is recommended due to its lightweight, durability, and resistance to corrosion.

Hexagonal ducts are not common in HVAC systems; rectangular, round, and spiral ducts are more typical.

A minimum clearance of 4 inches is recommended to allow for proper airflow and maintenance access.

ASHRAE establishes standards for air duct design, installation, and maintenance to ensure efficiency and safety.

Airflow velocities between 10-30 feet per second are typical in residential HVAC systems for efficient operation.

Sizing calculations determine the appropriate dimensions of ducts to ensure they can handle the necessary airflow without causing inefficiencies or pressure drops.

Mastic sealant is commonly used to seal duct joints effectively and prevent air leakage, improving system efficiency.

Fire dampers are crucial safety devices that close automatically to stop the spread of fire through ductwork.

Stainless steel is preferred for its durability and resistance to corrosion, making it suitable for high-temperature environments.

Flexible ducts should be limited to a maximum length of 50 feet to prevent excessive pressure drops and airflow restrictions.

Altitude does not significantly impact air duct system efficiency, unlike factors such as duct design, insulation, and airflow.

Spiral ducts are often used in high-velocity systems due to their ability to handle increased airflow efficiently.