The answer to 'what does heat pump do' is that a heat pump is a heating and cooling system that transfers heat between the inside and outside of a home. Heat pumps work by moving heat rather than generating it, making them an energy-efficient alternative to furnaces and air conditioners. They can provide both heating and cooling by reversing the flow of refrigerant to absorb heat from the outside air and transfer it indoors during the winter, and then reverse the process to remove heat from the indoor air and transfer it outside during the summer.
Heat pumps are highly versatile and can be used in a variety of climates, from mild to extreme. They are a popular choice for homeowners looking to reduce their energy costs and carbon footprint, as they are generally more efficient than traditional HVAC systems.