A heat pump cools your house by moving heat from the inside of your home to the outside. Heat pumps are very efficient and can save you money on your energy bills. Heat pumps work like a reverse refrigerator. They take the heat from the inside of your home and move it to the outside. In the summer, the heat pump cools your home by moving heat from the inside of your home to the outside. The heat pump has a compressor that pumps the refrigerant through the system. The refrigerant absorbs the heat from the inside of your home and transfers it to the outside. The heat pump also has a fan that blows the air over the coils. This helps to cool the air inside your home.