What type of heating system is characterized by a furnace and ducts?

A heating system that utilizes a furnace and ducts is known as a forced air system. In this setup, the furnace heats air, which is then distributed throughout the building via a network of ducts. This method is efficient for heating large areas quickly, as the warm air is blown through the ducts and into various rooms, providing uniform heating.

The key features of a forced air system include its ability to quickly raise the temperature of a space, the potential for incorporating air filtration (improving indoor air quality), and the option to use central air conditioning in conjunction with the same ductwork. This system contrasts significantly with the other heating types. For example, radiant heating warms surfaces directly rather than heating air, while hydronic heating relies on water and pipes to distribute heat. Electric heating primarily uses electric resistance to generate heat locally, often not involving ducts at all.

Understanding these distinctions highlights why a forced air system is defined specifically by its use of a furnace and ductwork for heating a space.