What is the primary function of an air-to-air heat pump?

The primary function of an air-to-air heat pump is to transfer heat between the inside and outside of a building. This technology allows the heat pump to either extract heat from the outside air and bring it indoors during colder months or remove heat from the indoor space and release it outdoors during warmer months. By utilizing this heat exchange process, air-to-air heat pumps efficiently regulate indoor temperatures, providing both heating and cooling functions depending on the season.

While some options suggest limited functionalities such as providing only heating or solely cooling, the versatility of air-to-air heat pumps comes from their ability to effectively perform both tasks through the same system. The option that involves generating electricity for household use does not accurately reflect the operational purpose of heat pumps, as they do not produce electricity but rather move existing heat energy from one place to another.