Which HVAC system uses a system of ductwork, dampers, and fans to distribute heating and cooling?

Which HVAC system uses a system of ductwork, dampers, and fans to distribute heating and cooling?

• A. Forced air handling unit
• B. Hydronic radiant system
• C. Direct expansion system
• D. Evaporative cooling system

Answer: (A)

The system that uses a network of ducts, dampers, and fans to move heating and cooling through a building is a forced air distribution setup. In this approach, air is conditioned by a central unit (furnace or air handler) and then pushed through supply ducts to rooms. Dampers at branch points regulate how much air reaches each zone, and a blower or fan provides the pressure to move the air through the ductwork. Returns bring the air back to be reconditioned, creating a continuous loop of conditioned air. Radiant hydronic systems heat or cool spaces by circulating hot or cold water through floors or panels, with heat transfer occurring directly through surfaces rather than through moving air. Direct expansion refers to the refrigerant cycle in air conditioning or heat pump systems, where cooling is achieved by refrigerant evaporation; while it can be part of a central system, the defining feature here isn’t a network of ducts with dampers and fans. Evaporative cooling relies on evaporation to reduce air temperature and typically involves different airflow arrangements than a ducted forced-air system.

The system that uses a network of ducts, dampers, and fans to move heating and cooling through a building is a forced air distribution setup. In this approach, air is conditioned by a central unit (furnace or air handler) and then pushed through supply ducts to rooms. Dampers at branch points regulate how much air reaches each zone, and a blower or fan provides the pressure to move the air through the ductwork. Returns bring the air back to be reconditioned, creating a continuous loop of conditioned air.

Radiant hydronic systems heat or cool spaces by circulating hot or cold water through floors or panels, with heat transfer occurring directly through surfaces rather than through moving air. Direct expansion refers to the refrigerant cycle in air conditioning or heat pump systems, where cooling is achieved by refrigerant evaporation; while it can be part of a central system, the defining feature here isn’t a network of ducts with dampers and fans. Evaporative cooling relies on evaporation to reduce air temperature and typically involves different airflow arrangements than a ducted forced-air system.