What is the difference between forced air and radiant heating systems?

The correct choice highlights the fundamental distinction between forced air and radiant heating systems. Forced air heating systems operate by generating warm air and distributing it through a network of ducts. This method relies on the movement of air to circulate heat throughout a space, allowing for rapid temperature adjustments.

In contrast, radiant heating systems function by warming surfaces directly, such as floors, walls, or ceilings, which then radiate heat into the living space. This process results in a more uniform heat distribution, as the heat emanates from the surfaces rather than being blown in by air.

This understanding clarifies why the first option accurately describes the key operational differences between the two heating methods, emphasizing the modes of heat transfer involved: air distribution versus direct surface heating. The other choices present variations that do not accurately capture the mechanisms involved in each system, demonstrating the importance of distinguishing their fundamental characteristics.