What is a plenum in hood systems?

What is a plenum in hood systems?

• A. A space where air collects and is distributed into the exhaust ducts.
• B. A filter cartridge
• C. A static pressure chamber
• D. A storage compartment

Answer: (A)

In a hood system, a plenum is the chamber that collects the air coming off the cooking area and feeds it into the exhaust ducts. It acts as a gathering and distribution space, helping to stabilize airflow into the ductwork and toward the exhaust fan. This design minimizes turbulence, supports consistent suction, and provides a place where grease-laden air enters the duct system in an orderly way. The plenum is typically part of the hood or located just above it, built to resist grease buildup and allow for cleaning. The other options describe components or ideas that aren’t what a plenum represents. It isn’t a filter cartridge, a static pressure chamber, or a storage compartment.

In a hood system, a plenum is the chamber that collects the air coming off the cooking area and feeds it into the exhaust ducts. It acts as a gathering and distribution space, helping to stabilize airflow into the ductwork and toward the exhaust fan. This design minimizes turbulence, supports consistent suction, and provides a place where grease-laden air enters the duct system in an orderly way. The plenum is typically part of the hood or located just above it, built to resist grease buildup and allow for cleaning.

The other options describe components or ideas that aren’t what a plenum represents. It isn’t a filter cartridge, a static pressure chamber, or a storage compartment.