As homes get smarter, there is an increased need to add more intelligence, increase energy efficiency, and lower the carbon footprint of the appliances, all of which allow for the integration of millimeter-wave (mmWave) radar sensors. mmWave radar has many unique advantages over traditional motion and presence detection sensors. mmWave radar has high sensitivity to motion detection and insensitivity to the changing environment as well as higher accuracy. In home appliances, such as air conditioners and major appliances, mmWave radar can provide a variety of intelligent experiences that can help save energy and reduce carbon emissions. mmWave radar's unique technology advantages can empower smart homes.