Which component is primarily responsible for moving air through the building in a forced air system?

Which component is primarily responsible for moving air through the building in a forced air system?

• A. Ductwork
• B. Coils
• C. Humidifiers
• D. Dampers

Answer: (A)

In a forced-air system, the network that actually carries conditioned air to every room is the ductwork. The air is produced and conditioned by the furnace or air handler, and the blower pushes it into these ducts. From there, the duct layout and size distribute the air throughout the building, delivering it to spaces as needed. Coils are for heat exchange, turning refrigerant or heated air into the desired temperature. Humidifiers add moisture to the air, not move it. Dampers regulate how much air flows through different parts of the system, but they don’t move air by themselves. So the ducts are the primary pathways that move air through the building.

In a forced-air system, the network that actually carries conditioned air to every room is the ductwork. The air is produced and conditioned by the furnace or air handler, and the blower pushes it into these ducts. From there, the duct layout and size distribute the air throughout the building, delivering it to spaces as needed.

Coils are for heat exchange, turning refrigerant or heated air into the desired temperature. Humidifiers add moisture to the air, not move it. Dampers regulate how much air flows through different parts of the system, but they don’t move air by themselves. So the ducts are the primary pathways that move air through the building.