How does a heat pump central air system work to efficiently heat and cool a home?

A heat pump central air system works by transferring heat between the inside and outside of a home. In the winter, it extracts heat from the outside air and brings it inside to warm the home. In the summer, it removes heat from inside the home and releases it outside to cool the home. This process is efficient because it doesn't generate heat, it simply moves it from one place to another.