What do combination appliances use to deliver heated air?

Combination appliances are designed to provide both heat and comfort by utilizing multiple methods to deliver heated air effectively throughout a space. They typically leverage the principles of convection currents and radiant energy waves.

Convection currents refer to the movement of air that occurs when warm air rises and cooler air sinks, creating a natural circulation within the room. This process helps distribute heated air more evenly, enhancing overall comfort. Additionally, radiant energy waves refer to the heat emitted from the surface of the appliance. These waves directly warm objects and surfaces in the area, contributing to an increase in temperature without needing the air temperature to rise significantly.

Together, these two mechanisms enable combination appliances to efficiently heat a space by utilizing both the circulation of warm air and the more direct method of heating through radiation, making this answer the most accurate choice in describing how such appliances operate.