What is a heat pump primarily used for?

A heat pump is primarily utilized for both heating and cooling a space, making it a versatile climate control solution. During colder months, it extracts heat from the outside air (or ground) and transfers it indoors to provide warmth. Conversely, in warmer months, it operates reversibly to extract heat from indoors and release it outside, effectively cooling the living space. This dual functionality is why heat pumps are popular in various climates, allowing for year-round comfort.

Understanding this concept clarifies why other options do not represent the primary use of a heat pump. Option one is limited, as it suggests the heat pump is only for heating, ignoring its cooling capabilities. The third option also misrepresents the heat pump's functionality by stating it is only for cooling spaces in the summer, which excludes its heating purpose. Lastly, the fourth option reduces a heat pump’s function to merely dehumidifying air, which is not its primary role; dehumidification can occur as a secondary effect during the cooling process, but it is not the main purpose of the device.