Residential HVAC Installation Practice Exam 2025 - Free HVAC Practice Questions and Study Guide

A forced-air system is designed specifically to utilize ducts for the distribution of conditioned air throughout a building. This type of system employs a central heating and cooling unit, which can include furnaces or air conditioners, that pushes air through a network of ducts. The conditioned air is then delivered to various rooms and spaces, providing uniform heating or cooling.

In contrast, radiant heating systems operate by warming the surfaces of a room, such as floors or walls, without the need for air ducts to distribute heated air. Hydronic systems use water as the heat transfer medium, circulating it through pipes rather than ducts. Geothermal systems can also involve hydronic components and exploit the earth’s temperature for heating and cooling, thereby not relying on ductwork for air distribution. Thus, the defining characteristic of a forced-air system is its ductwork, which is crucial for effectively delivering conditioned air throughout indoor spaces.