Where is the plenum typically secured in an air conditioning system?

Where is the plenum typically secured in an air conditioning system?

• A. Near the ceiling with screws
• B. On the floor
• C. In the attic
• D. Inside a wall

Answer: (A)

The plenum is the air distribution chamber that connects the air handler to the duct system, so it needs a stable, overhead mounting that lines up with the overhead ducts. Securing it near the ceiling with screws anchors it to the structure, keeps joints aligned and sealed, and minimizes vibration and air leaks as air moves through the system. This placement also keeps the plenum out of occupied space and makes maintenance and sealing easier. Placing it on the floor, inside a wall, or deep in an attic away from the ceiling would complicate routing, increase leakage, and hinder service.

The plenum is the air distribution chamber that connects the air handler to the duct system, so it needs a stable, overhead mounting that lines up with the overhead ducts. Securing it near the ceiling with screws anchors it to the structure, keeps joints aligned and sealed, and minimizes vibration and air leaks as air moves through the system. This placement also keeps the plenum out of occupied space and makes maintenance and sealing easier. Placing it on the floor, inside a wall, or deep in an attic away from the ceiling would complicate routing, increase leakage, and hinder service.