What type of appliance is designed to supply heated air through ducts?

The central furnace is specifically designed to supply heated air throughout a building via a system of ducts. This type of appliance heats air and then uses a fan or blower to distribute that warm air through a network of ducts to various rooms. Its ability to provide consistent and central heating makes it a popular choice for whole-house heating systems.

In contrast, a space heater typically operates in small, defined areas rather than servicing an entire home and does not utilize ductwork. A water heater is designed for heating water, providing hot water for domestic use but does not distribute heated air. Radiant heaters, on the other hand, typically function by warming surfaces or the air directly in their vicinity rather than through a ducted system, making them less effective for whole-home heating in the same way that a central furnace is designed to do.